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Cisco CCNA practice test: Try these 20 exam questions
Use this CCNA practice test as study material to prepare for the Cisco CCNA Routing and Switching 200-125 exam. With 20 questions on a range of topics, we're not playing around.
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- The evolution of SDN and its role in networking
Has SDN run its course, or has the architecture simply evolved? In many current products, data centers and cloud environments, SDN may be closer than you think.
- Wi-Fi Certified 6 launches new era for wireless connectivity
The Wi-Fi 6 wireless standard is now ready for deployment, thanks to the debut of a certification effort that helps guarantee interoperability.
- Try a CCNA 200-301 practice quiz from the official cert guide
This practice quiz provides a sneak peek into the new 'CCNA 200-301 Official Cert Guide, Volume 1,' which reflects Cisco's CCNA certification and exam redesigns.
Definitions
- UDP (User Datagram Protocol)
UDP (User Datagram Protocol) is an alternative communications protocol to Transmission Control Protocol (TCP) used primarily for establishing low-latency and loss-tolerating connections between applications on the internet.
- dynamic spectrum access (dynamic spectrum management)
Dynamic spectrum access (DSA), also referred to as dynamic spectrum management (DSM), is a set of spectrum utilization techniques that adjusts frequency in real time based on fluctuating circumstances.
- URL (Uniform Resource Locator)
A URL (Uniform Resource Locator) is a unique identifier used to locate a resource on the internet. It is also referred to as a web address.
Browse Networking Topics
Campus LAN
As enterprises continue to invest in campus LAN environments, adding new software and networking components will allow them to handle an ever-growing amount of traffic. Read expert advice, along with the latest news, about the technologies being used to retool campus area network design. See why campus LANs are now supporting more complex applications and services.
Recent Definitions
- nslookup
nslookup is the name of a program that lets an Internet server administrator or any computer user enter a host name (for example, "whatis.com") and find out the corresponding IP address or domain name system (DNS) record.
- VLAN (virtual LAN)
A VLAN (virtual LAN) is a subnetwork which can group together collections of devices on separate physical local area networks (LANs).
- Internet
The Internet, sometimes called simply "the Net," is a worldwide system of computer networks -- a network of networks in which users at any one computer can, if they have permission, get information from any other computer (and sometimes talk directly to users at other computers).
Highlights
- Wi-Fi Certified 6 launches new era for wireless connectivity
- Arista CloudVision 2019 from Arista Networks advances visibility
- 5G frequency spectrum forces new look at coverage strategies
More Campus LAN Topics
Back to TopData Center
Learn about data center networking considerations, including evolving data center network architectures and components, emerging data center network protocols and standards, and converged data center and storage networks.
Recent Definitions
- dynamic and static
In general, dynamic means energetic, capable of action and/or change, or forceful, while static means stationary or fixed.
- SDN controller (software-defined networking controller)
An SDN controller is an application in a software-defined networking (SDN) architecture that manages flow control for improved network management and application performance.
- load balancing
Load balancing is a technique used to distribute workloads uniformly across servers or other compute resources to optimize network efficiency, reliability and capacity.
Highlights
- Arista CloudVision 2019 from Arista Networks advances visibility
- Cisco acquisitions in 2019 bolster service provider strategy
- What network tools are available for public cloud monitoring?
More Data Center Topics
Back to TopInfrastructure
Advancements in enterprise hardware and network protocols are allowing network pros to take advantage of new technologies to design and implement logical and physical LANs that contribute to business success. In our network infrastructure section, find out what you need to know to design your enterprise local area network infrastructure, including 10/100/100 Ethernet and switching technology, green networking initiatives, PoE, VLANs, and information on IP addressing, subnetting, TCP/IP and network routing protocols.
Recent Definitions
- UDP (User Datagram Protocol)
UDP (User Datagram Protocol) is an alternative communications protocol to Transmission Control Protocol (TCP) used primarily for establishing low-latency and loss-tolerating connections between applications on the internet.
- dynamic spectrum access (dynamic spectrum management)
Dynamic spectrum access (DSA), also referred to as dynamic spectrum management (DSM), is a set of spectrum utilization techniques that adjusts frequency in real time based on fluctuating circumstances.
- URL (Uniform Resource Locator)
A URL (Uniform Resource Locator) is a unique identifier used to locate a resource on the internet. It is also referred to as a web address.
Highlights
- Wi-Fi Certified 6 launches new era for wireless connectivity
- Try a CCNA 200-301 practice quiz from the official cert guide
- Arista CloudVision 2019 from Arista Networks advances visibility
More Infrastructure Topics
- Content delivery networks (CDNs)
- Edge computing
- Mobile and wireless network technology
- Network protocols and standards
- Network services
- Network virtualization technology
- Open source networking
Network management
Enterprises must be able to accurately track network performance to ensure users can access the applications they need. Find out about the latest trends shaping network monitoring software and tools, including expert advice about the steps companies should take to best manage their networks.
Recent Definitions
- Open Network Automation Platform
The Open Network Automation Platform (ONAP) is a networking project that provides a digital environment for the orchestration and automation of complex network services.
- streaming network telemetry
Streaming network telemetry is a real-time data collection service in which network devices such as routers, switches and firewalls continuously push network health data and interface measurements to a centralized collector.
- network configuration management (NCM)
Network configuration management is the process of organizing and maintaining information about all of the components in a computer network.
Highlights
- Cisco acquisitions in 2019 bolster service provider strategy
- Legacy tools encumber modern network infrastructure monitoring
- The true cost of network performance issues for your business
More Network management Topics
Back to TopNetwork Security
Here you'll find network security resources for selecting and implementing security devices and maintaining secure networks. Find out how to design a secure network perimeter, where to locate a firewall and whether you need network access control.
Recent Definitions
- bogon
A bogon is an illegitimate IP address that falls into a set of IP addresses that have not been officially assigned to an entity by an internet registration institute, such as the Internet Assigned Number Authority (IANA).
- payload (computing)
In computing, a payload is the carrying capacity of a packet or other transmission data unit. The term has its roots in the military and is often associated with the capacity of executable malicious code to do damage. Technically, the payload of a specific packet or other protocol data unit (PDU) is the actual transmitted data sent by communicating endpoints.
Highlights
- How does 802.11ax security benefit from WPA3?
- How client VPN technologies will evolve with AI and automation
- How SD-WAN security can boost your network security strategy
Networking careers
Learn about networking certification and career resources to help engineers, managers, and architects and specialists hone their networking skills. Read about the most popular certifications, including Cisco's CCNA, CCNP, CCIE certifications, and learn how SDN, automation and other technologies are changing the way networking pros design and manage today's networks.
Recent Definitions
- NetOps
NetOps, also referred to as NetOps 2.0, is a networking approach that encompasses the use of DevOps tools, methods and techniques to create an agile, scalable and programmable infrastructure capable of delivering business-critical applications and services rapidly and efficiently.
- 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.
- system administrator (sysadmin)
In information technology (IT), a system administrator (sysadmin) is a person who supports a multi-user computing environment and ensures continuous, optimal performance of IT services and support systems.
Highlights
- Try a CCNA 200-301 practice quiz from the official cert guide
- Prepare for the CCNA 200-301 exam with this guide preview
- Cisco author says new CCNA exam undergoes largest change ever
SDN
Software-defined networking architecture offers a new way to oversee network control, cloud connectivity and application performance. Explore SDN's benefits and disadvantages and catch up on the latest news and trends while learning about SDN's part in the networking industry's broader move to software-based networking.
Recent Definitions
- software-defined networking (SDN)
Software-defined networking (SDN) is a network architecture that aims to make data center networks agile and flexible.
- service chaining
Service chaining, in an information technology (IT) context, is the addition of software-defined networking (SDN) capabilities in a specific sequence.
- Open Network Automation Platform
The Open Network Automation Platform (ONAP) is a networking project that provides a digital environment for the orchestration and automation of complex network services.
Highlights
- The evolution of SDN and its role in networking
- Ciena's Blue Planet automation suite wins TechTarget award
- What is the difference between SDN and NFV?
Telecom networks
Learn about traditional and emerging telecommunications networking technology, including core, access and metro network infrastructure for global, national and regional wired and wireless service provider networks. Beyond network infrastructure, find expert advice on telecom business issues and network operations.
Recent Definitions
- dynamic spectrum access (dynamic spectrum management)
Dynamic spectrum access (DSA), also referred to as dynamic spectrum management (DSM), is a set of spectrum utilization techniques that adjusts frequency in real time based on fluctuating circumstances.
- fiber optics (optical fiber)
Fiber optics, or optical fiber, refers to the medium and the technology associated with the transmission of information as light pulses along a glass or plastic strand or fiber.
- voice over LTE (VoLTE)
Voice over LTE (VoLTE) is a digital packet technology that uses 4G LTE networks to route voice traffic and transmit data.
Highlights
- Cisco acquisitions in 2019 bolster service provider strategy
- CenturyLink acquires Streamroot, adding P2P CDN capabilities
- 5G frequency spectrum forces new look at coverage strategies
WAN
Wide area network connections allow companies to access and share corporate resources among distributed sites. Discover more about available WAN technologies and services and how organizations can use them to aptly meet business requirements. Learn about factors such as the number of company sites, location, security and bandwidth needs when assessing WAN requirements.
Recent Definitions
- SD-WAN (software-defined WAN)
Software-defined WAN (SD-WAN) is a technology to distribute network traffic across wide area networks (WAN) that uses software-defined networking (SDN) concepts to automatically determine the most effective way to route traffic to and from branch offices and data center sites.
- WAN (Wide Area Network)
A wide area network (WAN) is a geographically distributed telecommunications network that interconnects multiple local area networks (LANs).
- load balancing
Load balancing is a technique used to distribute workloads uniformly across servers or other compute resources to optimize network efficiency, reliability and capacity.
Highlights
- How SD-WAN security can boost your network security strategy
- Gartner Hype Cycle deems software-defined networking obsolete
- Compare the leading SD-WAN vendors before you buy