Networking
Top Stories
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Tip
31 Jul 2026
Understanding the network-as-software transformation
Manual methods no longer cut it as enterprises adopt advanced architectural models. Instead, software-based approaches like NaaS and infrastructure as code are gaining traction. Continue Reading
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News
24 Jul 2026
NetScout doubles AI DDoS defenses after infrastructure buy
NetScout boosts its attack mitigation capacity to 33 Tbps and plans to strengthen integration between its on-premises and cloud-based tools. 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
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Tip
04 Aug 2021
Network observability vs. monitoring: What's the difference?
Traditional network monitoring is useful for collecting data about network issues. But network observability can add further insights into network health and end-user experience. Continue Reading
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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
04 Aug 2021
system administrator (sysadmin)
A system administrator (sysadmin) is an information technolog professional who supports a multiuser computing environment and ensures continuous, optimal performance of IT services and support systems. 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
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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
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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
5G core network functionality driven by SDN, NFV
To reap the full benefits of 5G, operators are using SDN, NFV and network slicing to build out core network functionality. 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
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Quiz
29 Jul 2021
Test your knowledge in this 5G QoS quiz
In this quiz, test your knowledge of network slicing, QoS, and other technologies and practices related to 5G networking. Continue Reading
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Definition
27 Jul 2021
asymmetric communications
Asymmetric communications is a term pertaining to any system in which the data speed or quantity, when averaged over time, is different in one direction from the other. Continue Reading
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Definition
27 Jul 2021
frequency-hopping spread spectrum (FHSS)
Frequency-hopping spread spectrum (FHSS) transmission is the repeated switching of the carrier frequency during radio transmission to reduce interference and avoid interception. Continue Reading
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Definition
26 Jul 2021
network access control (NAC)
Network access control (NAC), also called network admission control, is a method to bolster the security, visibility and access management of a proprietary network. Continue Reading
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Definition
26 Jul 2021
preboot execution environment (PXE)
Preboot execution environment (PXE), pronounced pixie, is a set of standards that enables a computer to load an operating system (OS) over a network connection. Continue Reading
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Tip
23 Jul 2021
BGP vs. OSPF: When to use each protocol
BGP and OSPF are two of the most common routing protocols. While BGP excels with dynamic routing for large networks, OSPF offers more efficient path choice and convergence speed. Continue Reading
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Feature
23 Jul 2021
AIOps network management requires vendor-buyer teamwork
Before buying AIOps tools, network managers should work closely with vendors to ensure they collect the correct network data and use relevant algorithms. Continue Reading
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Definition
22 Jul 2021
SYN scanning
SYN scanning is a tactic that a malicious hacker can use to determine the state of a communications port without establishing a full connection. Continue Reading
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Definition
22 Jul 2021
Stream Control Transmission Protocol (SCTP)
Stream Control Transmission Protocol (SCTP) is a connection-oriented network protocol for transmitting multiple streams of data simultaneously between two endpoints that have established a connection in a network. Continue Reading
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Definition
21 Jul 2021
port
A port in computing has three main uses, each as a type of receptacle in networking, computer hardware and software. Continue Reading
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Definition
20 Jul 2021
FDDI (Fiber Distributed Data Interface)
FDDI (Fiber Distributed Data Interface) is a network standard that uses fiber optic connections in a local area network (LAN) that can extend in range up to 200 kilometers (124 miles). Continue Reading
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Definition
20 Jul 2021
megabits per second (Mbps)
Megabits per second (Mbps) are units of measurement for network bandwidth and throughput. It is used to show how fast a network or internet connection is. Continue Reading
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Definition
20 Jul 2021
passive optical network (PON)
A passive optical network (PON) is a system commonly used by telecommunications network providers that brings fiber optic cabling and signals all or most of the way to the end user. Continue Reading
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Feature
19 Jul 2021
Experts discuss stretched VLAN use cases, MEC and more
In this networking blog roundup, experts give reasons to stretch VLANs, discuss benefits of deploying private MEC with 5G, and differentiate between junior and senior IT engineers. Continue Reading
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Definition
19 Jul 2021
American Wire Gauge (AWG)
American Wire Gauge (AWG) is the standard way to denote wire size in North America. Continue Reading
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Definition
19 Jul 2021
DTMF (dual tone multi-frequency)
Dual tone multi-frequency (DTMF) is the sounds or tones generated by a telephone when the numbers are pressed. Continue Reading
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Definition
16 Jul 2021
committed information rate (CIR)
Committed information rate (CIR) is the guaranteed rate at which a Frame Relay network will transfer information under normal line conditions. Continue Reading
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Feature
16 Jul 2021
2021 networking trends for a post-pandemic enterprise
In 2020, the pandemic threw the best-laid IT plans into chaos. As enterprises find their footing again, here are four network trends defining the second half of 2021. Continue Reading
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Definition
15 Jul 2021
BOOTP (Bootstrap Protocol)
BOOTP (Bootstrap Protocol) is an internet protocol that lets a network user automatically be configured to receive an IP address and have an operating system booted without user involvement. Continue Reading
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Answer
15 Jul 2021
What is the network edge and how is it different from edge computing?
The network edge is where an enterprise network connects to third-party network services. Edge computing is a distributed architecture that processes data closer to end users. Continue Reading
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Definition
15 Jul 2021
anti-replay protocol
The anti-replay protocol provides Internet Protocol (IP) packet-level security by making it impossible for a hacker to intercept message packets and insert changed packets into the data stream between a source computer and a destination computer. Continue Reading
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Definition
15 Jul 2021
Switched Multimegabit Data Service (SMDS)
Switched Multimegabit Data Service (SMDS) is a public, packet-switched service aimed at enterprises that need to exchange large amounts of data with other enterprises over the wide area network on a nonconstant or bursty basis. Continue Reading
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Answer
15 Jul 2021
What does the 0.0.0.0 IP address mean and why is it used?
One of a few special-purpose addresses, IP address 0.0.0.0 has several applications in networking. It stands in as a placeholder address, identifies a default route and more. Continue Reading
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Tip
14 Jul 2021
How to use iPerf3 to test network bandwidth
In this in-depth tip, learn how to use iPerf3, a network testing tool to measure throughput and benchmark your WAN links to ensure effectivity. Continue Reading
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Definition
14 Jul 2021
extranet
An extranet is a private network that enterprises use to provide trusted third parties -- such as suppliers, vendors, partners, customers and other businesses -- secure, controlled access to business information or operations. Continue Reading
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Definition
14 Jul 2021
Network Address Translation (NAT)
A Network Address Translation (NAT) is the process of mapping an internet protocol (IP) address to another by changing the header of IP packets while in transit via a router. Continue Reading
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Definition
13 Jul 2021
customer premises equipment (CPE)
Customer premises equipment (CPE) is telecommunications and information technology equipment kept at the customer's physical location rather than on the service provider's premises. Continue Reading
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Answer
13 Jul 2021
The differences between PAP and CHAP
PAP uses a two-way handshake to authenticate client sessions, while CHAP uses a three-way handshake. Both authentication processes are common, but one is more secure. Continue Reading
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Definition
13 Jul 2021
encoding and decoding
Encoding and decoding are used in many forms of communications, including computing, data communications, programming, digital electronics and human communications. Continue Reading
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Definition
13 Jul 2021
optoisolator (optical coupler or optocoupler)
An optoisolator (also known as an optical coupler, photocoupler, optocoupler) is a semiconductor device that transfers an electrical signal between isolated circuits using light. Continue Reading
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Definition
08 Jul 2021
token ring
A token ring is a data link for a local area network (LAN) in which all devices are connected in a ring or star topology and pass one or more tokens from host to host. Continue Reading
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Definition
08 Jul 2021
Snort
Snort is an open source network intrusion detection system (NIDS) created by Sourcefire founder and former CTO Martin Roesch. Continue Reading
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Answer
06 Jul 2021
Static vs. dynamic routing: What is the difference?
Static routing uses preconfigured routes to send traffic to its destination, while dynamic routing uses algorithms to determine the best path. How else do the two methods differ? Continue Reading
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Definition
02 Jul 2021
poison reverse
In a computer network that uses the Routing Information Protocol (RIP) or other distance vector routing protocol, poison reverse is a loop avoidance process. Continue Reading
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News
01 Jul 2021
Microsoft will host AT&T 5G network on Azure
AT&T will move its 5G services to Microsoft's Azure cloud. The move provides Microsoft with a critical 5G customer while AT&T cuts costs and gains scalability. Continue Reading
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Quiz
30 Jun 2021
12 official practice questions for the CCNA 200-301 exam
These practice questions for CCNA 200-301 lay out what readers need to know about network security and IP routing in the LAN, from 'CCNA 200-301 Official Cert Guide, Volumes 1 and 2.' Continue Reading
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Feature
28 Jun 2021
Five-nines availability: What it really means
Learn what five-nines availability means and discover the steps enterprises should take to make sure network services are fully accessible. Continue Reading
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Feature
25 Jun 2021
How enterprises can close 5 major SASE gaps
Despite five major gaps that hamper SASE implementation, Gartner recommended enterprises should plan their migration timeline and aim to consolidate to a single vendor. Continue Reading
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Tip
24 Jun 2021
How to calculate network bandwidth requirements
Figuring out how to calculate bandwidth requirements is vital to ensuring your network runs smoothly, and it's best to use the correct formula from the beginning. Continue Reading
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News
23 Jun 2021
Aruba adds network auto-fixes to AI Insights
Aruba's self-correct feature in AI Insights automatically fixes problems deemed safe to repair based on customer feedback. Continue Reading
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Answer
22 Jun 2021
How to use two VPN connections at the same time
Network managers and users might opt to set up two VPN connections at the same time, from the same remote device. But that might not be possible -- or safe. Continue Reading
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Definition
22 Jun 2021
bus network
A bus network is a local area network (LAN) topology in which each node -- a workstation or other device -- is connected to a main cable or link called a bus. Continue Reading
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Definition
18 Jun 2021
flooding (network)
In a computer network, flooding occurs when a router uses a non-adaptive routing algorithm to send an incoming packet to every outgoing link except the node on which the packet arrived. Continue Reading
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Definition
18 Jun 2021
ping sweep (ICMP sweep)
A ping sweep (also known as an ICMP sweep) is a basic network scanning technique used to determine which of a range of IP addresses map to live hosts (computers). Continue Reading
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Definition
18 Jun 2021
cognitive radio (CR)
Cognitive radio (CR) is a form of wireless communication in which a transceiver can intelligently detect which communication channels are in use and which ones are not. Continue Reading
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Definition
18 Jun 2021
CRC-4 (Cyclic Redundancy Check 4)
CRC-4 (Cyclic Redundancy Check 4) is a form of cyclic redundancy checking -- a method of checking for errors in transmitted data -- that is used on E1 trunk lines. Continue Reading
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Definition
17 Jun 2021
maximum transmission unit (MTU)
The maximum transmission unit (MTU) is the largest size frame or packet -- in bytes or octets (eight-bit bytes) -- that can be transmitted across a data link. Continue Reading
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Feature
17 Jun 2021
3 best practices for network observability
Research shows a correlation with NetOps success and network observability. Following best practices of network observability can facilitate this success. Continue Reading
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Definition
17 Jun 2021
crosstalk
Crosstalk is a disturbance caused by the electric or magnetic fields of one telecommunication signal affecting a signal in an adjacent circuit. Continue Reading
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Definition
17 Jun 2021
Uuencode (Uuencode/Uudecode)
Uuencode (also called Uuencode/Uudecode) is a popular utility for encoding and decoding files exchanged between users or systems in a network. Continue Reading
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Definition
15 Jun 2021
NetBIOS (Network Basic Input/Output System)
NetBIOS (Network Basic Input/Output System) is a network service that enables applications on different computers to communicate with each other across a local area network (LAN). Continue Reading
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News
11 Jun 2021
Cisco DNA Center update tackles customer headaches
The latest DNA Center upgrade simplifies deploying the campus network controller and scaling the platform to handle more endpoints. Cisco plans to release it in mid-June. Continue Reading
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Tip
11 Jun 2021
The pros and cons of Palo Alto Networks' SASE platform
Palo Alto Networks is commonly mentioned in SASE discussions. While the vendor has strong security capabilities, it also brings integration complexities and PoP limitations. Continue Reading
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Definition
11 Jun 2021
near-end crosstalk (NEXT)
Near-end crosstalk (NEXT) is an error condition that can occur when connectors are attached to twisted pair cabling. Continue Reading
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Definition
10 Jun 2021
10 Gigabit Ethernet (10 GbE)
10 Gigabit Ethernet (10 GbE) is a telecommunication technology that offers data speeds up to 10 billion bits per second. Continue Reading
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Tip
10 Jun 2021
Use NSX firewall best practices to improve security
VM security is integral to a healthy data center. VMware's NSX-T software offers comprehensive security measures through firewalls. Make them work with a few best practices. Continue Reading
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Definition
10 Jun 2021
spectrum analyzer
A spectrum analyzer is a device that measures and displays signal amplitude (strength) as it varies by frequency within its frequency range (spectrum). Continue Reading
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Tip
09 Jun 2021
How to build VMware HCI on a budget
HCI is a costly investment that can streamline networking, compute and management in your data center. Consider affordable alternatives to expensive HCI before adoption. Continue Reading
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Tip
08 Jun 2021
VMware network monitoring strategies for better performance
VMware network virtualization complicates how admins monitor network traffic. With best practices and monitoring tools, they can improve network performance. Continue Reading
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Tip
07 Jun 2021
How to pick the best network security service provider
Managed security service providers have different levels of expertise. Be sure to match your organization's security needs with the right network security provider. Continue Reading
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Definition
07 Jun 2021
virtual routing and forwarding (VRF)
Virtual routing and forwarding (VRF) is a technology included in Internet Protocol (IP) network routers that enables multiple instances of a routing table to exist in a virtual router and work simultaneously. Continue Reading
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News
04 Jun 2021
Cisco readies portfolio for hybrid cloud, modern data centers
Cisco tackles hybrid cloud complexity with the introduction of the UCS X-Series unified computing system, ThousandEyes integrations and Intersight advancements. Continue Reading
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Definition
04 Jun 2021
HDLC (High-level Data Link Control)
HDLC (High-level Data Link Control) is a group of protocols or rules for transmitting data between network points (sometimes called nodes). Continue Reading
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Feature
04 Jun 2021
Experts say Open RAN deployment is on the rise
Networking experts examined Open RAN revenue surges as the industry shifts toward the open model. Meanwhile, enterprises should consider the long-term benefits of switching vendors. Continue Reading
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Definition
04 Jun 2021
Signaling System 7 (SS7)
Signaling System 7 (SS7) is an international telecommunication protocol standard that defines how the network elements in a public switched telephone network (PSTN) exchange information and control signals. Continue Reading
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Definition
03 Jun 2021
IEEE 802.3
802.3, or IEEE 802.3, is a working group of standard specifications for Ethernet, a method of packet-based physical communication in a local area network maintained by the Institute of Electrical and Electronics Engineers. Continue Reading
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News
02 Jun 2021
Microsoft buys ReFirm Labs to bolster IoT firmware security
Microsoft has bought ReFirm Labs in an IoT security play. The company said Refirm's open source-based products would help it address firmware vulnerabilities in IoT devices. Continue Reading
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Tip
02 Jun 2021
5 steps to achieve network infrastructure modernization
All networks may be different, but companies have similar goals when they look to upgrade their network infrastructures. Assessing current designs is just the first step. Continue Reading
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Definition
01 Jun 2021
bits per second (bps or bit/sec)
In data communications, bits per second (bps or bit/sec) is a common measure of data speed for computer modems and transmission carriers. Continue Reading
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News
27 May 2021
Juniper ships first major Apstra release
Juniper said the latest update to its recently acquired Apstra network automation product sends a message to customers that the company is committed to multi-platform support. Continue Reading
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Definition
27 May 2021
propagation delay
Propagation delay is the amount of time required for a signal to be received after it has been sent; it is caused by the time it takes for the signal to travel through a medium. Continue Reading
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Tip
26 May 2021
The migration to enterprise network as a service
Enterprise network as a service is becoming a popular consumption model for networking functions. But, as with any emerging technology, it's important to weigh the options carefully. Continue Reading
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Tip
26 May 2021
Enterprise RF spectrum management best practices
Effective spectrum management requires coordination from company departments to follow certain policies before introducing wireless devices to the enterprise. Continue Reading
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Definition
24 May 2021
CCNA certification
Cisco Certified Network Associate (CCNA) is a technical certification that Cisco offers for early-career networking professionals. Continue Reading
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Answer
21 May 2021
6 trends in corporate campus networks
Networks are evolving, and that evolution includes enterprise campus networks. Trends like network automation, 5G and machine learning are modernizing campus networks. Continue Reading
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Feature
21 May 2021
Cloud-based network management leads 2021 network investments
A recent ESG survey shows that many enterprises speeding their digital transformation plans are also increasing 2021 network investment, emphasizing cloud-based network management. Continue Reading
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News
20 May 2021
Demand for Cisco products rises during pandemic recovery
Cisco reported higher product demand and sales as massive COVID-19 vaccination efforts in the U.S. led companies to prepare for an economic recovery. Continue Reading
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Tip
18 May 2021
VMware SDN enhances network service allocation automation
VMware's Modern Network framework helps spur NSX to be a viable contender in the SDN market. Continue Reading
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Feature
18 May 2021
An introduction to Go network programming
This chapter excerpt from 'Network Programming with Go' dives into logging and metrics, while also providing Go code examples and best practices. Continue Reading
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Feature
18 May 2021
Best practices and strategies for logging in Go
Author Adam Woodbeck discusses how network teams can use the Go programming language for logging and metrics. One tip: Log prudently, and use metrics generously. Continue Reading
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Tip
18 May 2021
Learn how to configure NSX firewall rules
VMware NSX users can configure firewall rules into specific policies to protect individual VMs, regardless of their location in the virtual infrastructure. Continue Reading
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Tip
18 May 2021
How to secure your home Wi-Fi network in 7 steps
When securing your home Wi-Fi, update devices regularly, change passwords consistently, turn off unused services and inspect outdoor network equipment. Continue Reading
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News
14 May 2021
Cisco's latest acquisition spree nabs three companies
Cisco's acquisitions, announced this week, would improve event hosting in Webex, boost network speeds for 5G, and enhance its security platform. Deal terms were not released. Continue Reading
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News
12 May 2021
Cisco bolsters CSP portfolio with Sedona Systems acquisition
Cisco's acquisition of Sedona Systems is expected to add significant carrier technology for 5G slicing and routed optical networking. Continue Reading
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Feature
12 May 2021
Top network IT investments include 5G, smartNICs, cloud
Market analysts showed interest in 5G and smartNICs during an ONUG conference panel on enterprise IT investments. And don't forget the seemingly inevitable mention of cloud. Continue Reading
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Tip
11 May 2021
Hybrid network vs. hybrid network infrastructure
Hybrid networks and hybrid network infrastructure blend different kinds of equipment, geographic locations, network ownership and technology disciplines. Continue Reading
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Tip
10 May 2021
Routed optical networking tactic could be game changer
A new routing architecture could help eliminate management and service headaches stemming from routing IP traffic on optical networks. Continue Reading