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Bring yourself up to speed with our introductory content.
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
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
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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Time Division Multiple Access (TDMA)
Time Division Multiple Access (TDMA) is a digital modulation technique used in digital cellular telephone and mobile radio communication. Continue Reading
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
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
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
shielded twisted pair (STP)
Shielded twisted pair (STP) is a special kind of copper telephone and local area network (LAN) wiring used in some business installations.Continue Reading
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
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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network protocol
A network protocol is a set of established rules that dictate how to format, transmit and receive data so that computer network devices -- from servers and routers to endpoints -- can communicate, regardless of the differences in their underlying ...Continue Reading
VLAN (virtual LAN)
A VLAN (virtual LAN) is a subnetwork which can group together collections of devices on separate physical local area networks (LANs).Continue Reading
TCP/IP (Transmission Control Protocol/Internet Protocol)
TCP/IP, or Transmission Control Protocol/Internet Protocol, is a suite of communication protocols used to interconnect network devices on the internet.Continue Reading
bandwidth (network bandwidth)
Network bandwidth is a measurement indicating the maximum capacity of a wired or wireless communications link to transmit data over a network connection in a given amount of time.Continue Reading
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
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
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
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
FTP (File Transfer Protocol)
FTP (File Transfer Protocol) is a network protocol for transmitting files between computers over TCP/IP connections.Continue Reading
How to set up a home network -- a 7-step guide
From understanding hardware components to managing network performance and security, this guide teaches networking newbies how to set up a home network.Continue Reading
Ansible vs. Terraform vs. Vagrant: What's the difference?
Ansible, Terraform and Vagrant are common infrastructure automation platforms with specific use cases, benefits and drawbacks. But choosing a platform doesn't need to be confusing.Continue Reading
4 attributes key to network-as-a-service model
For a network-as-a-service model to work for the enterprise, it needs to offer four key attributes: an application-specific, elastic, secure and personalized VPN.Continue Reading
Wi-Fi 6 vs. Wi-Fi 6E: Spectrum, not hype, is key difference
The extended spectrum of Wi-Fi 6E sounds promising. But, when assessing Wi-Fi 6 vs. Wi-Fi 6E, organizations should pay close attention to radio frequency characteristics.Continue Reading
What does a network infrastructure upgrade project involve?
Explore the steps organizations must take to upgrade their network infrastructure, including how to tell if an upgrade is necessary and how to evaluate resources for the project.Continue Reading
Wi-Fi 6 rollout requires careful review of network devices
Wi-Fi 6 is just one part of the overall enterprise network. Organizations need to evaluate several network components to ensure a smooth Wi-Fi 6 deployment.Continue Reading
Network layer
Located at Layer 3 of the Open Systems Interconnection (OSI) communications model, the primary function of the network layer is to move data into and through other networks.Continue Reading
Understand top SD-WAN advantages and disadvantages
Cost, complexity, security, training, troubleshooting and software bugs are some top SD-WAN challenges. Discover more on the advantages that SD-WAN can usher into an enterprise.Continue Reading
wireless mesh network (WMN)
A wireless mesh network (WMN) is a mesh network created through the connection of wireless access point (WAP) nodes installed at each network user's locale.Continue Reading
SD-WAN (software-defined WAN)
Software-defined WAN (SD-WAN) is technology that uses software-defined networking (SDN) concepts to distribute network traffic across a wide area network (WAN).Continue Reading
3G (third generation of mobile telephony)
3G refers to the third generation of cellular technology that enables mobile telephony.Continue Reading
WAN (wide area network)
A wide area network (WAN) is a geographically distributed telecommunications network that interconnects multiple local area networks (LANs).Continue Reading
Cisco Live 2021 conference coverage, news and analysis
Cisco Live 2021, a two-day global virtual conference, highlights top networking trends. The digital event also features keynote speeches and technical education sessions.Continue Reading
firewall as a service (FWaaS)
Firewall as a service (FWaaS), also known as a cloud firewall, is a service that provides cloud-based network traffic inspection capabilities to customers seeking to decommission or augment their existing network firewall appliances.Continue Reading
CDMA (Code-Division Multiple Access)
CDMA (Code-Division Multiple Access) refers to any of several protocols used in second-generation (2G) and third-generation (3G) wireless communications.Continue Reading
ICMP (Internet Control Message Protocol)
ICMP (Internet Control Message Protocol) is an error-reporting protocol that network devices such as routers use to generate error messages to the source IP address when network problems prevent delivery of IP packets.Continue Reading
Test your knowledge of socket programming in Python
In this quiz, review the fundamentals of socket programming in Python, including port scanning, TCP and UDP, and how to enable different methods from the socket module.Continue Reading
Explore this ultimate socket programming guide for beginners
In this socket programming guide preview, learn how sockets work, the role of socket programming in enterprise networks and the ins and outs of socket programming in Python.Continue Reading
How to get started with socket programming for beginners
To understand socket programming for beginners, basic network and security concepts are critical -- and having Python skills won't hurt, either. Learn more in this expert Q&A.Continue Reading
orthogonal frequency-division multiplexing (OFDM)
Orthogonal frequency-division multiplexing (OFDM) is a method of data transmission where a single information stream is split among several closely spaced narrowband subchannel frequencies instead of a single wideband channel frequency.Continue Reading
5 steps to conduct network penetration testing
Enterprises that want to ensure competent network security strategies should look at how they can implement penetration testing, considering red teams and physical pen tests.Continue Reading
OSI model (Open Systems Interconnection)
OSI (Open Systems Interconnection) is a reference model for how applications communicate over a network.Continue Reading
5 benefits of Wi-Fi 6 for enterprise networks
In a perfect world, Wi-Fi 6 could introduce several benefits to business networks. But real-world conditions could curb the wireless technology's true potential.Continue Reading
Get started with network penetration testing for beginners
Authentication, patching and configuration are among the most common vulnerabilities found through network penetration testing. Learn more in this free chapter excerpt.Continue Reading
Advice on how to learn network penetration testing skills
As beginners learn network penetration testing skills, they should remember these expert tips: Pay attention to what the client wants, and stick to offense, not defense.Continue Reading
radio frequency (RF, rf)
Radio frequency (RF) is a measurement representing the oscillation rate of electromagnetic radiation spectrum, or electromagnetic radio waves, from frequencies ranging from 300 GHz to as low as 9 kHz.Continue Reading
metropolitan area network (MAN)
A metropolitan area network (MAN) is a computer network that is larger than a single building local area network (LAN) but is located in a single geographic area that is smaller than a wide area network (WAN).Continue Reading
How to build a private 5G business case
As you build a private 5G business case, be sure to include private 5G's benefits and challenges, as well as how to prove its ROI. Here's everything you need to know.Continue Reading
SASE vs. SD-WAN comparison: How are they related?
SASE and SD-WAN both connect geographically separate endpoints to each other and an organization's network resources, but the methods in which they do so differ in various ways.Continue Reading
DevNet vs. CCNA: What's the difference?
While CCNA certification concentrates on foundational network engineering knowledge, DevNet certification focuses on modern networking concepts, like automation and software.Continue Reading
local area network (LAN)
A local area network (LAN) is a group of computers and peripheral devices that share a common communications line or wireless link to a server within a distinct geographic area.Continue Reading
An overview of 3GPP 5G releases and what each one means
3GPP has standardized features and specifications for all cellular technology generations since 3G. Learn about 3GPP's 5G timeline and notable features each 5G release introduces.Continue Reading
How to monitor home network traffic for added security
When addressing home network monitoring, track all connected devices, and take advantage of open source tools, like packet capture, to sniff out malicious traffic.Continue Reading
How to understand networking and the internet for beginners
For beginners, learning how networking and the internet truly work can feel overwhelming. One expert encourages patience, practice and assurance that networking isn't unknowable.Continue Reading
How to learn networking fundamentals, from a software pro
Networking basics include protocols, network layers and processes that must happen for computers to communicate across a network. Here's how to start learning these basics.Continue Reading
VLAN vs. subnet: What's the difference?
While VLANs are a type of subnet, they have their own unique capabilities and characteristics that differentiate them from subnets. However, the OSI model plays a major role in both.Continue Reading
VPN vs. VLAN: What's the difference?
VPNs and VLANs are different technologies with some similarities. VPNs connect authorized users to corporate network resources, while VLANs connect geographically separate devices.Continue Reading
How to calculate SASE return on investment and costs
SASE return on investment will vary for each organization, depending on use cases and architecture requirements. But the metrics used to determine ROI and cost factors are the same.Continue Reading
Broadband vs. Wi-Fi: What's the difference?
Broadband and Wi-Fi are common technical terms often used interchangeably -- although they shouldn't be. Both provide connectivity, but they do so in different ways.Continue Reading
network engineer
A network engineer is a technology professional who has the necessary skills to plan, implement and oversee the computer networks that support in-house voice, data, video and wireless network services.Continue Reading
network performance monitoring
Network performance monitoring is a process of measuring and monitoring the quality of service of a network to understand if it is properly operating.Continue Reading
Top network attacks of 2020 that will influence the decade
You've heard of phishing, ransomware and viruses. Now, keep them in mind because one cybersecurity expert says these threats and more may cause IT headaches for the next decade.Continue Reading
Advice for an effective network security strategy
Security audits, evaluations of tools and looking realistically at trending technologies are some ways an organization can ensure its network security is the best it can be.Continue Reading
Test your network threats and attacks expertise in this quiz
Network security is an ever-changing subject, but many of its common threats have plagued IT pros for years -- and will likely continue to do so. See what you know in this quiz.Continue Reading
What are the differences between Wi-Fi and WiMax?
Wi-Fi is the wireless standard used to build wireless LANs, while carriers primarily used WiMax to build wireless metropolitan area networks before moving to LTE.Continue Reading
Differences among WEP, WPA, WPA2 and WPA3 wireless security protocols
As wireless networks have evolved, so have the protocols for securing them. Get an overview of WLAN security standards, and learn the differences among WEP, WPA, WPA2 and WPA3.Continue Reading
software-defined networking (SDN)
Software-defined networking (SDN) is an architecture that abstracts different, distinguishable layers of a network in order to make networks agile and flexible.Continue Reading
network visibility
Network visibility is an awareness of the components within and the data moving through an enterprise computer network.Continue Reading
How to calculate a subnet mask from hosts and subnets
IP addressing and subnetting are important and basic elements of networks. In this article, learn how to calculate a subnet mask based on the required number of subnets and hosts.Continue Reading
Managed vs. unmanaged switches: What are the differences?
Managed and unmanaged network switches differ in various ways, including control and cost. Managed switches support more granular control, yet unmanaged switches have lower prices.Continue Reading
3 types of wireless site surveys and how to conduct them
Network teams can avoid signal coverage issues by performing different wireless site surveys as they evaluate new spaces, set up sites and operate the network.Continue Reading
VPN (virtual private network)
A virtual private network (VPN) is a service that creates a safe, encrypted online connection.Continue Reading
Cisco IOS (Cisco Internetwork Operating System)
Cisco IOS (Internetwork Operating System) is a proprietary operating system that runs on Cisco Systems routers and switches.Continue Reading
Network pros share Cisco DevNet certification advice
Cisco DevNet certifications require a lot of time investment, but network pros who pursue the certifications say the gained skills and knowledge are worth it.Continue Reading
A look inside the official Cisco DEVASC 200-901 guidebook
In this book excerpt, readers can explore the Cisco DEVASC 200-901 official guide and get a flavor of one of Cisco's newest exams and its blend of networking and software topics.Continue Reading
Start your Cisco DevNet Associate training with this quiz
Ready for Cisco's introductory DevNet exam, DEVASC 200-901? Start your Cisco DevNet Associate training with this practice quiz directly from the official exam guidebook.Continue Reading
network security
In information technology, network security is the act of maintaining the integrity of a computer network and the data within it.Continue Reading
What is the difference between IP telephony and VoIP?
While many IT professionals use VoIP and IP telephony synonymously, some argue for keeping a couple of subtle distinctions between the two terms in mind.Continue Reading
Cisco Certified Entry Networking Technician (CCENT)
Cisco Certified Entry Networking Technician (CCENT) is a now-retired certification offered by Cisco, as part of their certification program.Continue Reading
How do VPN vs. cloud services compare for remote work?
As remote work becomes increasingly normal, IT teams must decide which remote access technologies will benefit employees more. VPN and cloud services are two top choices.Continue Reading
Network engineer vs. software engineer: What’s the difference?
Network and software engineering are two different fields, and the roles of network engineers vs. software engineers vary, despite potential overlaps in software skills.Continue Reading
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
client-server model (client-server architecture)
Client-server is a relationship in which one program (the client) requests a service or resource from another program (the server).Continue Reading
microsegmentation
Microsegmentation is a technique used to divide a network into logical and secure units through the application of policies that dictate how data and applications are accessed and controlled.Continue Reading
How and why to implement Wi-Fi QoS
Quality of service, as network pros know, prioritizes apps as they cross the network. But Wi-Fi QoS needs to be considered, too, in relation to the overall network.Continue Reading
The role of SD-WAN templates before and during deployment
SD-WAN deployments require knowledge of network design and trust in software to take over some network maintenance duties. This is where SD-WAN templates come into play.Continue Reading
Learn to onboard, provision devices in Cisco's SD-WAN book
Here's a look inside Cisco's SD-WAN book, which details design and deployment for network teams looking to deploy SD-WAN and insights for SD-WAN certification hopefuls.Continue Reading
6 practice questions for SD-WAN certification training
Before you start SD-WAN certification training, try this quiz from Cisco's official SD-WAN guidebook, which covers onboarding and provisioning devices, as well as SD-WAN templates.Continue Reading
What network automation certification options are available?
Network automation certifications and training include vendor-specific commercial credentials, as well as open source options. Which career path is right for you?Continue Reading
The basics of zero-trust network access explained
Some experts believe VPNs have struggled to adapt to an increasingly cloud-based, internet-dependent world. Enter zero-trust network access, which may be network security's future.Continue Reading
How to set up backup internet connections for home offices
When a home office becomes an employee's only office, reliable internet connectivity is a must. Here are three factors to consider for backup internet connections for home offices.Continue Reading
edge device
An edge device is any piece of hardware that controls data flow at the boundary between two networks.Continue Reading
How to build a resilient network design
Everything fails eventually, even in networking. Enterprises can prepare for network failure by building resilience and redundancy into their network infrastructure design.Continue Reading
What does a VPN concentrator do?
As more employees work remotely and VPN use rises, VPN concentrators have become trendy. But what does a VPN concentrator do exactly, and how do you deploy one?Continue Reading
IEEE 802 wireless standards
The IEEE 802 standard is a collection of networking standards that cover the physical and data-link layer specifications for technologies such as Ethernet and wireless.Continue Reading
The 3 different types of 5G technology for enterprises
5G isn't a single flavor of cellular technology; it's three flavors, and each one can enable advanced capabilities, such as ultrareliable low latency and IoT connectivity.Continue Reading
telecommunications (telecom)
Telecommunications, also known as telecom, is the exchange of information over significant distances by electronic means and refers to all types of voice, data and video transmission.Continue Reading
millimeter wave (MM wave)
Millimeter wave (MM wave), also known as millimeter band, is the band of spectrum with wavelengths between 10 millimeters (30 GHz) and 1 millimeter (300 GHz).Continue Reading
thin client (lean client)
A thin client (or lean client) is a virtual desktop computing model that runs on the resources stored on a central server instead of a computer's resources.Continue Reading
Learn the key differences between 4G vs. 5G networks
Yes, 4G and 5G network architectures will differ, but organizations may not see change for some time. This feature explores 4G vs. 5G differences and lays out what you should know.Continue Reading
Enterprise 5G deployment options and how to procure them
Enterprises have to choose from three main 5G deployment options to make 5G work: public services from a mobile operator, network slicing or building their own 5G networks.Continue Reading