Network infrastructure
Network hardware and physical appliances, such as routers, switches, gateways, hubs and bridges, serve as the vital foundation of network infrastructure. Common network protocols and more emergent network software also play major roles in any architecture. While networking has shifted to software-centric principles, see how traditional network infrastructure keeps pace.
Top Stories
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Tip
03 Dec 2024
The purpose of route poisoning in networking
Route poisoning is an effective way of stopping routers from sending data packets across bad links and stop routing loops. This limits delays and creates a more stable network. Continue Reading
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News
03 Dec 2024
Arista simplifies switching to its campus network
Arista says companies can switch to its campus network while holding on to legacy stacked switches. Continue Reading
By- Antone Gonsalves, News Director
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Answer
10 Nov 2021
Fog computing vs. edge computing: What's the difference?
Fog computing vs. edge computing -- while many IT professionals use the terms synonymously, others make subtle but important distinctions between them. Continue Reading
By- Stephen J. Bigelow, Senior Technology Editor
- Alissa Irei, Senior Site Editor
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Definition
09 Nov 2021
downloading
Downloading is the transmission of a file or data from one computer to another over a network, usually from a larger server to a user device. Continue Reading
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Definition
05 Nov 2021
IDSL
IDSL is a hybrid of a digital subscriber line (DSL) and integrated services digital network (ISDN) technology that transmits data slightly faster than ISDN but much slower than most DSL services. Continue Reading
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News
04 Nov 2021
Aruba launches more powerful Instant On switches
Aruba is launching the 1960 series, the latest addition to its small business-optimized Instant On portfolio. The new switch offers more bandwidth and scalability. Continue Reading
By- Madelaine Millar, TechTarget
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Answer
04 Nov 2021
What are the 6 components of structured cabling?
The six components of structured cabling are Entrance Facilities, Equipment Room, Backbone Cabling, Telecommunications Room, Horizontal Cabling and Work Area. Continue Reading
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Definition
01 Nov 2021
ARPANET
The U.S. Advanced Research Projects Agency Network (ARPANET) was the first public packet-switched computer network. Continue Reading
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Tip
29 Oct 2021
Use network standardization to facilitate automation
Network teams can automate and standardize network designs to improve configurations, simplify operations and more easily implement changes within their networks. Continue Reading
By- Terry Slattery, NetCraftsmen
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Tip
29 Oct 2021
Get up to speed with enhanced content delivery networks
With enhanced features and new delivery options, CDNs are poised to make greater inroads with enterprises to improve UX across the board. Continue Reading
By- Kevin Tolly, The Tolly Group
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News
28 Oct 2021
Cisco's newest Silicon One chip steps up routing performance
The P100 ASIC delivers a high performance-to-power ratio for web-scale data centers. It's the 11th chip in the Silicon One family. Continue Reading
By- Madelaine Millar, TechTarget
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Definition
25 Oct 2021
HELLO packet
A HELLO packet is a special data packet (message) that is sent out periodically from a router to establish and confirm network adjacency relationships to other routers in the Open Shortest Path First (OSPF) communications protocol. Continue Reading
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Answer
25 Oct 2021
Network redundancy vs. resiliency: What's the difference?
The difference between network redundancy and resiliency is redundancy duplicates network devices while resiliency is the self-recovery of system failures. Continue Reading
By- Andrew Froehlich, West Gate Networks
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News
22 Oct 2021
Gartner predicts IT spending to reach $4.5 trillion in 2022
Corporate boards will prioritize their digital tech initiatives, as fully remote work gives way to a thoughtful hybrid work model that places IT at the core of business operations. Continue Reading
By- Madelaine Millar, TechTarget
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Tip
22 Oct 2021
A quick guide to BGP best practices
The use of Border Gateway Protocol is prevalent among ISPs and enterprises. While BGP best practices change for specific use cases, some recommendations are helpful in all scenarios. Continue Reading
By- Terry Slattery, NetCraftsmen
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Definition
21 Oct 2021
full-duplex
Full-duplex data transmission means that data can be transmitted in both directions on a signal carrier at the same time. Continue Reading
By- Peter Loshin, Former Senior Technology Editor
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Definition
21 Oct 2021
route summarization (route aggregation)
Route summarization -- also known as route aggregation -- is a method to minimize the number of routing tables in an Internet Protocol (IP) network. Continue Reading
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Tutorial
21 Oct 2021
What are the different types of network cables?
The main types of network cables are coax, fiber optics, and shielded and unshielded twisted pair. As enterprises deploy new technologies, it's critical to select the right cables. Continue Reading
By- Chris Partsenidis, Firewall.cx
- David Jacobs, The Jacobs Group
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News
20 Oct 2021
Aruba introduces the distributed data center switch
Aruba's CX distributed switch, available in January, provides security through the embedded Pensando ASICs. Services powered by the chips include load balancing and a firewall. Continue Reading
By- Madelaine Millar, TechTarget
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Definition
18 Oct 2021
Variable Length Subnet Mask (VLSM)
Variable Length Subnet Mask (VLSM) is a subnet -- a segmented piece of a larger network -- design strategy where all subnet masks can have varying sizes. Continue Reading
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Definition
18 Oct 2021
network node
A computer network is a system of computers and computing devices that are connected via communication links. Continue Reading
By- Ben Lutkevich, Site Editor
- Kate Gerwig, Editorial Director
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Definition
18 Oct 2021
Seebeck effect
The Seebeck effect is a phenomenon in which a temperature difference between two dissimilar electrical conductors or semiconductors produces a voltage difference between the two substances. Continue Reading
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Definition
15 Oct 2021
delay-tolerant network (DTN)
A delay-tolerant network (DTN) is a network that's designed to operate effectively in extreme conditions and over very large distances, such as with space communications. Continue Reading
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Tip
15 Oct 2021
Static IP vs. dynamic IP addresses: What's the difference?
Static IP addresses are typically used for servers, routers and switches. Dynamic IP addresses, however, are commonly used for workstations, phones and tablets. Continue Reading
By- Damon Garn, Cogspinner Coaction
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Definition
13 Oct 2021
NBMA (non-broadcast multiple access)
Non-broadcast multiple access (NBMA) is one of four network types in the Open Shortest Path First (OSPF) communications protocol. Continue Reading
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Definition
12 Oct 2021
CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance)
CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) is a protocol for carrier transmission in 802.11 networks. Continue Reading
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Definition
12 Oct 2021
fixed-length subnet mask (FLSM)
A fixed-length subnet mask (FLSM) refers to a type of enterprise or provider networking where a block of IP addresses is divided into multiple subnets of equal length (i.e., an equal number of IP addresses). Continue Reading
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Definition
11 Oct 2021
virtual network adapter
A virtual network adapter is software that operates like a physical network adapter within the host operating system (OS) or through an application installed on the endpoint or server. Continue Reading
By- Andrew Froehlich, West Gate Networks
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Definition
08 Oct 2021
flow routing
Flow routing is a network routing technology that takes variations in the flow of data into account to increase routing efficiency. Continue Reading
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Definition
07 Oct 2021
GMPLS (Generalized Multiprotocol Label Switching or Multiprotocol Lambda Switching)
GMPLS (Generalized Multiprotocol Label Switching) is a networking technology that enables fast and reliable network switching of data flows on any type of network infrastructure. Continue Reading
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Definition
06 Oct 2021
integration server
An integration server is a type of computer server that facilitates the interaction between different operating systems (OSes), services and applications across an enterprise IT environment. Continue Reading
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Definition
06 Oct 2021
computer hardware
Computer hardware is a collective term used to describe any of the physical components of an analog or digital computer. Continue Reading
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Feature
05 Oct 2021
What's the difference between internet and Ethernet?
Internet and Ethernet are two technologies that sound similar and provide connectivity, but the methods of providing connectivity differ significantly. Continue Reading
By- Deanna Darah, Site Editor
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Definition
05 Oct 2021
Layer Two Tunneling Protocol (L2TP)
Layer Two Tunneling Protocol (L2TP) is an extension of the Point-to-Point Tunneling Protocol (PPTP) used by an internet service provider (ISP) to enable the operation of a virtual private network (VPN) over the internet. Continue Reading
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Definition
04 Oct 2021
Class of Service (CoS)
Class of Service (CoS) is a way of managing traffic in a network by grouping similar types of traffic -- such as email, streaming video, voice over IP and large document file transfer -- together and treating each type as a class with its own level of network service priority. Continue Reading
By- Andrew Froehlich, West Gate Networks
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Definition
01 Oct 2021
What is modulation?
Modulation is the process of converting data into radio waves by adding information to an electronic or optical carrier signal. Continue Reading
By- Terry Slattery, NetCraftsmen
- John Burke, Nemertes Research
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Definition
01 Oct 2021
10BASE-T
10BASE-T is an Ethernet standard for local area networks and one of several physical media specified in the Institute of Electrical and Electronics Engineers (IEEE) 802.3 standard. Continue Reading
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Definition
01 Oct 2021
frequency-shift keying (FSK)
Frequency-shift keying (FSK) is a method of transmitting digital signals using discrete signals. Continue Reading
By- Andrew Froehlich, West Gate Networks
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Definition
01 Oct 2021
subcarrier
A subcarrier is a secondary modulated signal frequency modulated into the main frequency (the carrier) to provide an additional channel of transmission. Continue Reading
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News
30 Sep 2021
FCC commissioner urges more funding for satellite broadband
FCC Commissioner Nathan Simington said satellite-based wireless broadband should be available in remote areas where fiber isn't an option. Continue Reading
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Definition
30 Sep 2021
internet metering
Internet metering is a service model in which an internet service provider (ISP) keeps track of bandwidth use and charges users accordingly. Continue Reading
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Definition
28 Sep 2021
bottleneck
A bottleneck, in a communications context, is a point in the enterprise where the flow of data is impaired or stopped entirely. Continue Reading
By- Andrew Froehlich, West Gate Networks
- Stephen J. Bigelow, Senior Technology Editor
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Answer
28 Sep 2021
CDN vs. cloud computing: What's the difference?
Content delivery networks and cloud computing architectures may appear to serve the same function. But each has a specific role to play when distributing content. Continue Reading
By- Andrew Froehlich, West Gate Networks
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Definition
23 Sep 2021
circuit switching
Circuit switching is a type of network configuration in which a physical path is obtained and dedicated to a single connection between two endpoints in the network for the duration of a dedicated connection. Continue Reading
By- Ben Lutkevich, Site Editor
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Definition
23 Sep 2021
Simple Network Management Protocol (SNMP)
Simple Network Management Protocol (SNMP) is an application-layer protocol for monitoring and managing network devices on a local area network (LAN) or wide area network (WAN). Continue Reading
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Definition
23 Sep 2021
What is a thin client (lean client)?
A thin client (or lean client) is a virtual desktop computing model that runs on the resources stores on a central server instead of a computer's resources. Continue Reading
By- Alexander S. Gillis, Technical Writer and Editor
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Definition
22 Sep 2021
frame relay
Frame relay is a packet-switching telecommunications service designed for cost-efficient data transmission for intermittent traffic between local area networks (LANs) and between endpoints in wide area networks (WANs). Continue Reading
By- Ben Lutkevich, Site Editor
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Feature
22 Sep 2021
Ways to speed up white box networking adoption
Most organizations are slow to deploy new techniques, white box networking included. Experts explain why and offer advice on how to speed up adoption across enterprises. Continue Reading
By- Deanna Darah, Site Editor
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Definition
22 Sep 2021
What is the Universal Service Fund (USF)?
The Universal Service Fund (USF) is a United States government program that supports telecommunications access and affordability in rural and low-income communities. Continue Reading
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Definition
22 Sep 2021
100 Gigabit Ethernet (100 GbE)
100 Gigabit Ethernet (100 GbE) is an Ethernet standard that supports data speeds of up to 100 billion bits (gigabits) per second (Gbps). Continue Reading
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Definition
22 Sep 2021
Next Hop Resolution Protocol (NHRP)
Next Hop Resolution Protocol (NHRP) is an automated configuration technology that routes data on a distributed network by discovering the best routing path between endpoints. Continue Reading
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Definition
22 Sep 2021
What is an edge router?
An edge router is a specialized router located at a network boundary that enables an internal network to connect to external networks. Continue Reading
By- Ben Lutkevich, Site Editor
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Definition
20 Sep 2021
What is PSTN (public switched telephone network)?
The public switched telephone network, or PSTN, is the world's collection of interconnected voice-oriented public telephone networks. Continue Reading
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Definition
17 Sep 2021
Joint Academic Network (JANET)
The Joint Academic Network (JANET) is an internal, high-speed computer network that links the U.K. education and research community. Continue Reading
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Definition
17 Sep 2021
visitor-based networking (visitor-based network)
Visitor-based networking (VBN) is a computer network with high-speed internet access provided by an organization for temporary use by visitors, guests or other users in a public area. Continue Reading
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Definition
14 Sep 2021
Service Profile Identifier (SPID)
In telecommunications, a Service Profile Identifier (SPID) is a number assigned by a phone company to a terminal on an Integrated Services Digital Network (ISDN) B-channel. Continue Reading
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Feature
10 Sep 2021
The role of smartNICs in modern enterprise networks
This chapter excerpt from 'Building a Future-Proof Cloud Infrastructure' looks at how smartNICs can support distributed services platforms for both cloud providers and enterprises. Continue Reading
By- Jennifer English, Executive Editor
- Pearson Education
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Feature
10 Sep 2021
How smartNIC architecture supports scalable infrastructure
In this Q&A, author Silvano Gai discusses how smartNICs can benefit enterprises by providing more granular telemetry and supporting distributed cloud infrastructure. Continue Reading
By- Jennifer English, Executive Editor
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Definition
10 Sep 2021
GVRP (GARP VLAN Registration Protocol or Generic VLAN Registration Protocol)
GVRP (GARP VLAN Registration Protocol or Generic VLAN Registration Protocol) is a standards-based protocol that facilitates control of virtual local area networks (VLANs) within a larger network. Continue Reading
By- Andrew Froehlich, West Gate Networks
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Definition
09 Sep 2021
Gigabit Ethernet (GbE)
Gigabit Ethernet (GbE), a transmission technology based on the Ethernet frame format and protocol used in local area networks (LANs), provides a data rate of 1 billion bits per second, or 1 gigabit (Gb). Continue Reading
By- Alexander S. Gillis, Technical Writer and Editor
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Definition
07 Sep 2021
trunk (trunking)
A network trunk is a communications line or link designed to carry multiple signals simultaneously to provide network access between two points. Continue Reading
By- Garry Kranz
- John Burke, Nemertes Research
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Definition
07 Sep 2021
serial digital interface (SDI)
Serial digital interface (SDI) is a standard for digital video and audio transmission over coaxial or fiber optic cabling. Continue Reading
By- Andrew Froehlich, West Gate Networks
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Definition
02 Sep 2021
Point-to-Point Protocol over Ethernet (PPPoE)
Point-to-Point Protocol over Ethernet (PPPoE) is a network protocol that facilitates communication between network endpoints. Continue Reading
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Definition
31 Aug 2021
1000BASE-T (Gigabit Ethernet)
1000BASE-T is Gigabit Ethernet -- 1 gigabit is 1,000 megabits per second (Mbps) on copper cables, using four pairs of Category 5 (Cat5) unshielded twisted pair (UTP) to achieve the gigabit data rate. Continue Reading
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Definition
27 Aug 2021
Server Message Block protocol (SMB protocol)
The Server Message Block protocol (SMB protocol) is a client-server communication protocol used for sharing access to files, printers, serial ports and other resources on a network. Continue Reading
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Definition
27 Aug 2021
customer proprietary network information (CPNI)
Customer proprietary network information (CPNI) in the United States is information that telecommunications services -- such as local, long-distance and wireless telephone companies -- acquire about their subscribers. Continue Reading
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Definition
27 Aug 2021
dynamic port numbers
Dynamic port numbers, also known as private port numbers, are the port numbers that are available for use by any application to use in communicating with any other application, using the internet's Transmission Control Protocol (TCP) or User Datagram Protocol (UDP). Continue Reading
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Definition
26 Aug 2021
domain name system (DNS)
The domain name system (DNS) is a naming database in which internet domain names are located and translated into Internet Protocol (IP) addresses. Continue Reading
By- Ben Lutkevich, Site Editor
- John Burke, Nemertes Research
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Definition
26 Aug 2021
Real-time Transport Protocol (RTP)
Real-time Transport Protocol (RTP) is a network standard designed for transmitting audio or video data that is optimized for consistent delivery of live data. Continue Reading
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Definition
25 Aug 2021
NACK (NAK, negative acknowledgment, not acknowledged)
NACK, or NAK, an abbreviation for negative acknowledgment or not acknowledged, is a signal used by computers or other devices to indicate that data transmitted over a network was received with errors or was otherwise unreadable. Continue Reading
By- Katie Terrell Hanna
- Peter Loshin, Former Senior Technology Editor
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Definition
25 Aug 2021
Synchronous Data Link Control (SDLC)
Synchronous Data Link Control (SDLC) is a transmission protocol used to synchronously transfer code-transparent, serial-by-bit data over a communications channel. Continue Reading
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Definition
25 Aug 2021
multiplexing
Multiplexing, or muxing, is a way of sending multiple signals or streams of information over a communications link at the same time in the form of a single, complex signal. Continue Reading
By- Robert Sheldon
- John Burke, Nemertes Research
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Definition
24 Aug 2021
signal-to-noise ratio (S/N or SNR)
In analog and digital communications, a signal-to-noise ratio, often written S/N or SNR, is a measure of the strength of the desired signal relative to background noise (undesired signal). Continue Reading
By- Robert Sheldon
- John Burke, Nemertes Research
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Definition
23 Aug 2021
Synchronous Digital Hierarchy (SDH)
Synchronous Digital Hierarchy (SDH) is a group of fiber optic transmission rates that transport digital signals with different capacities. Continue Reading
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Feature
23 Aug 2021
Virtualization concepts to study for CCNP and CCIE exams
In this Q&A, author Patrick Gargano discusses the importance of virtualization in networking and offers studying advice for aspiring CCNPs and CCIEs in preparation for the exams. Continue Reading
By- Deanna Darah, Site Editor
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Feature
23 Aug 2021
Explore virtualization study topics for CCNP, CCIE exams
Aspiring CCNPs and CCIEs will need to grasp one of networking's most important topics: virtualization. 'Day 7' from Patrick Gargano's '31 Days' explains the subject in detail. Continue Reading
By- Deanna Darah, Site Editor
- Pearson Education
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Definition
20 Aug 2021
bit stuffing
Bit stuffing refers to the insertion of one or more bits into a data transmission as a way to provide signaling information to a receiver. Continue Reading
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Definition
19 Aug 2021
Power over Ethernet (PoE)
Power over Ethernet (PoE) is a technology for implementing wired Ethernet local area networks (LANs) that enables the electrical current necessary for operating each device to be carried by Ethernet data cables instead of standard electrical power cords and wiring. Continue Reading
By- Mary E. Shacklett, Transworld Data
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Definition
19 Aug 2021
Plain Old Telephone Service (POTS)
Plain Old Telephone Service (POTS) refers to the traditional, analog voice transmission phone system implemented over physical copper wires (twisted pair). Continue Reading
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Tip
16 Aug 2021
How to set up a VLAN for enterprise networks
VLANs can secure and prioritize network traffic. To set up VLANs correctly, teams should understand concepts like VLAN tagging and subnets. Continue Reading
By- David Jacobs, The Jacobs Group
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Definition
16 Aug 2021
connectionless
In telecommunications, connectionless describes communication between two network endpoints in which a message can be sent from one endpoint to another without prior arrangement. Continue Reading
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Definition
16 Aug 2021
conductance
Conductance is an expression of the ease with which electric current flows through materials like metals and nonmetals. Continue Reading
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Definition
12 Aug 2021
session border controller (SBC)
A session border controller (SBC) is a dedicated hardware device or software application that governs the manner in which phone calls are initiated, conducted and terminated on a voice over Internet Protocol (VoIP) network. Continue Reading
By- Alexander S. Gillis, Technical Writer and Editor
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Definition
12 Aug 2021
dense wavelength-division multiplexing (DWDM)
Dense wavelength-division multiplexing (DWDM) is an optical fiber multiplexing technology that is used to increase the bandwidth of existing fiber networks. Continue Reading
By- Andrew Zola
- John Burke, Nemertes Research
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Definition
12 Aug 2021
IPTV (Internet Protocol television)
IPTV (Internet Protocol television) is a service that provides television programming and other video content using the Transmission Control Protocol/Internet Protocol (TCP/IP) suite, as opposed to broadcast TV, cable TV or satellite signals. Continue Reading
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Definition
12 Aug 2021
carrier-to-noise ratio
In communications, the carrier-to-noise ratio, often written as CNR or C/N, is a measure of the received carrier strength relative to the strength of the received noise. Continue Reading
By- Andrew Froehlich, West Gate Networks
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Definition
11 Aug 2021
split horizon
Split horizon is a method used by distance vector protocols to prevent network routing loops. Continue Reading
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Definition
10 Aug 2021
Enhanced Interior Gateway Routing Protocol (EIGRP)
Enhanced Interior Gateway Routing Protocol (EIGRP) is a network protocol that enables routers to exchange information more efficiently than earlier network protocols, such as Interior Gateway Routing Protocol (IGRP) or Border Gateway Protocol (BGP). Continue Reading
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Definition
10 Aug 2021
star network
A star network is a local area network (LAN) topology in which all nodes -- personal computers (PCs), workstations or other devices -- are directly connected to a common central computer that is often referred to as a hub. Continue Reading
By- Andrew Froehlich, West Gate Networks
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Tip
10 Aug 2021
Troubleshooting a DHCP server failure
DHCP errors often result from DHCP server failure, a lack of available IP addresses and network failure. But troubleshooting steps vary depending on the error symptoms and causes. Continue Reading
By- Terry Slattery, NetCraftsmen
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Definition
09 Aug 2021
Spanning Tree Protocol (STP)
Spanning Tree Protocol (STP) is a Layer 2 network protocol used to prevent looping within a network topology. Continue Reading
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Definition
06 Aug 2021
sliding window (windowing)
The sliding window (windowing) technique is used by Transmission Control Protocol (TCP) to manage the flow of packets between two computers or network hosts. Continue Reading
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Definition
05 Aug 2021
frequency-division multiplexing (FDM)
In frequency-division multiplexing (FDM), multiple signals are combined for transmission on a single communications line or channel, with each signal assigned to a different frequency (subchannel) within the main channel. Continue Reading
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Feature
04 Aug 2021
3 delivery models for 5G and MEC
To enhance network capabilities, enterprises will need to consolidate 5G and MEC technologies in the future. Following a deployment model is the first step. Continue Reading
By- Deanna Darah, Site Editor
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Definition
04 Aug 2021
international private leased circuit (IPLC)
An international private leased circuit (IPLC) is a point-to-point private line used by an organization to communicate between offices that are dispersed throughout the world. Continue Reading
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Definition
03 Aug 2021
coded orthogonal frequency-division multiplexing (COFDM)
Coded orthogonal frequency-division multiplexing (COFDM) is a telecommunications modulation scheme that divides a single digital signal across 1,000 or more signal carriers simultaneously. Continue Reading
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Definition
02 Aug 2021
ADSL (Asymmetric Digital Subscriber Line)
ADSL (Asymmetric Digital Subscriber Line) is a technology that facilitates fast data transmission at a high bandwidth on existing copper wire telephone lines to homes and businesses. Continue Reading
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Definition
02 Aug 2021
Link Control Protocol (LCP)
In computer networking, Point-to-Point Protocol (PPP) provides a standard way to transport multiprotocol data over point-to-point links; within PPP, Link Control Protocol (LCP) establishes, configures and tests data link internet connections. Continue Reading
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Definition
30 Jul 2021
beamforming
Beamforming is a type of radio frequency (RF) management in which a wireless signal is directed toward a specific receiving device. Continue Reading
By- Alexander S. Gillis, Technical Writer and Editor
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Feature
30 Jul 2021
Enterprises look to formalize WFH network architecture
As work-from-home programs prove they're here to stay, enterprise network teams are assessing their network designs to ensure adequate support and performance for home offices. Continue Reading
By- Jennifer English, Executive Editor
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Definition
29 Jul 2021
File Transfer Access and Management (FTAM)
File Transfer Access and Management (FTAM) is an OSI application Layer 7 protocol that standardizes how files are accessed and managed in a distributed network file system. Continue Reading
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Feature
29 Jul 2021
An introductory overview of 5G network capabilities
In this Q&A, author William Stallings discusses 5G services, such as network slicing and QoS, and other topics covered in his book, '5G Wireless: A Comprehensive Introduction.' Continue Reading
By- Deanna Darah, Site Editor