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CCNA Network Fundamentals Vocab

Subjects : cisco, it-skills, ccna
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The MAC address that is permanently assigned to a LAN interface or NIC. It is called burned-in because the address is burned into a chip on the card - and the address cannot be changed. Also called universally administered address.






2. A layer 4 protocl of TCP/IP model - TCP lets applications guarantee delivery of data across a network.






3. The minimum time a NIC or interface can take to send an entire frame. Slot time - then - implies a minimum frame size.






4. Unique addresses that are public domain addresses.






5. A related set of communications transactions between two or more network devices.






6. Can refer to computer hardware that is to be used by multiple concurrent users. Alternatively - this term can refer to computer software that provides services to many users. For example - a web server consists of web server software running on some






7. A communication path over a medium used to transport information from a sender to a receiver. Multiple channels can be multiplexed over a single cable






8. As part of the TCP/IP internet layer - ICMP defines protocol messages used to inform network engineeres of how well an internetwork is working. For example - the ping command sends ICMP messages to determine whether a host can send packets ot another






9. A logical storage in the host's RAM to store ARP entries






10. The IPv4 multicast addresses 224.0.0.0 to 224.0.0.255. These addresses are to be used for multicast groups on a local network. Packets to these destinations are always transmitted with a TTTL value of 1






11. In IP subnetting - this refers to the portion of a set of IP addresses whose value must be identical for the addresses to be in the same subnet.






12. A field in the IP header that prevents a packet form indefinitely looping around an IP internetwork. Router decrements the TTL field each time they forward a packet - and if they decrement the TTL to 0 - the router discards the packet - which prevent






13. A term that describes IPv4 packets sent to all hosts in a particular network. In a directed broadcast - a single copy of the packet is routed to the specified network - where it is broadcast to all hosts on that network






14. To change the energy levels transmitted over some networking medium to transmit bits over that medium.






15. An encoding scheme 4B/5B uses 5-bit symbols and codes to represent 4 bits of data. 4B/5B is used in 100Base-tx ethernet.






16. An application protocol typically not used by end users. Instead - it is used by the network management software and networking devices to allow a network engineer to monitor and troubleshoot network problems.






17. A common term for 10base2 ethernet - referring to the fact that 10base2 cabling is thinner than coaxial cabling used for 10base5






18. A list of router holds in memory for the purpose of deciding how to forward packets.






19. International standardization program created by ISO and ITU-T to develop standards for data networking that facilitate multivendor equipment interoperability






20. The client part of the DNS client server mechanism. A DNS resolver creates queries sent a across a network to a same server - interprets responses - and returns information to the requesting programs.






21. Program used to download and send email. Email clients use POP3 to receive emails and use SMTP to send emails. Also called an email client






22. The time required for some network pdu's to be sent and received - and a response PDU to be sent and received. In other words - the time between when a device sends data and when the same device receives a response.






23. The learning of source addresses on incoming frames and adding them to the bridging table. After the table has been completed and when a frame is received on one of the bridge's interfaces - the bridge looks up the frame's destination address in its






24. A company that helps create the Internet by providing connectivity to enterprises and individuals - as well as interconnecting to other ISPs to create connectivity to all other ISPs.






25. A group defined by a class D address (multicast - ranging from 224.0.0.0 to 239.255.255.255) - whereupon hosts can pertain to multicast groups. Hosts that have the same multicast address are part of the same host group.






26. A written specification that defines what tasks a service or device should perform. Each protocol defines messages - often in the form of headers - plus the rules and processes by which these messages are used to achieve some stated purpose.






27. The largest IP packet size allowed to be sent out a particular interface. Ethernet interfaces default to an MTU of 1500 because the data field of an Ethernet frame should be limited to 1500 bytes - and the IP packet sits inside the ethernet frame's d






28. Defines which wires in a cable should connect to each pin on the connectors on both ends of a cable. For example - a UTP cable used for ethernet - used for a straight-through cable pinout - connects the wire at pin 1 on one end with the pin 1 on the






29. The lower of the two sublayers of the IEEE standard for ethernet. It is also the name of that sublayer






30. A generic term from OSI that refers to the data - headers - and trailers about which a particular network layer is concerned.






31. A method of expressing a network prefix. It uses a forward slash / followed by the network prefix.






32. A high-speed line or series of connections that forms a major pathway within a network. The term is often used to describe the main network connections comprising the Internet.






33. Routing table entry that is used to direct frames for which a next hop is not explicitly listed in the routing table. This route is used to forward a packet when no other known route exists for a give packet's destination address.






34. A corporate system such as a website that is explicitly used by internal employees. Can be assessed internally or remotely






35. A protocol that allows a computer to retrieve email from a server.






36. Define in RFC 1918 - an IP address that does not have to be globally unique because the address exists inside packets only when the packets are inside a single private IP internetwork. Private IP addresses are popularly used in most company today - w






37. A 32-bit number - written in dotted decimal notation - used by the IP to uniquely identify an interface connected to an IP network. It is also used as a destination address in an IP header to allow routing - and as a source address to allow a compute






38. A network that is connected to a device's interface. For example networks that interface with the router are known to be directly connected. Devices learn their initial IP routes based on being connected to these subnets.






39. The time required to send a single bit over some transmission medium. The time can be calculated at 1/speed - where speed is the number of bits per second sent over the medium






40. The layer 3 address to which the data is going.






41. Another form of the root word converge in the phrase converged network. This kind of network aggregates various forms of traffic such as voice - video and data on the same network infrastructure. A more common usage represents the process by which ro






42. A 1-bit flag in the TCP header that is used to request to the higher layers for immediate delivery of the packet.






43. The optical or electrical impulse on a physical medium for purposes of communication.






44. A grouping of code that meets a certain - already specified - condition for entering in that certain group.






45. The header defined by the IP. Used to create IP packets by encapsulating data supplied by higher-layer protocol (such as TCP) behind an IP header.






46. A method of internal processing by LAN switches. The switch must receive the entire frame before it sends the first bit of the frame. Store and forward switch is the method used by cisco switches.






47. An IPv4 multicast address that is restricted to a local group or organization.






48. The ability of a protocol. system or component to be modified to fit a new need.






49. A temporary storage where data that has been retrieved or calculated and is accessed frequently can be stored. After the data is stored in the cache - the processes can access the cached copy instead of accessing the original data. A cache reduces th






50. A network of computers that behave as if they are connected to the same network segment - even through they might be physically located on different segments of a LAN. VLANs are configured through software on the switch and router.






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