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CCNA Network Fundamentals Vocab

Subjects : cisco, it-skills, ccna
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • 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. Used in the CLI following the command. Keywords are parameters that are used with the command from a set of predefined values.






2. A device that connects to a local digital telephone loop for a WAN circuit to a serial interface on a network device - typically connecting to a router. The CSU/DSU performs physical Layer 1 signaling on WAN circuits






3. A map of the devices on a network representing how the devices communcate with each other.






4. A 1-bt flag in the TCP header used to indicate the initial value of the sequence number. The SYN flag is only set in the first two segments of the three-way TCP connection establishment sequence.






5. Additional data that is provided with a command to provide information used by the execution of the command. IOS command arguments are entered at the CLI after the command






6. Defines the commands - headers and processes by which web server and web browsers transfer files.






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






8. A MAC address that can be configured on a device. The LAA can be used in place of the BIA . This means that you can replace a NIC or use a substitute device without changing the address used by the network to access the station.






9. A notification sent from one network device to another to confirm that some event has occured.






10. A 1-bit field in the TCP header that is used by a device that wants to terminate its session with the other device. This is done by inserting the FIN flag in the flag field found in the TCP segment






11. 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






12. Normally - a relatively general term that refers to dfifferent kinds of networking devices. Historically - when routers were created - they were called gateways






13. Communication that only allows one station to receive while the other station is transmitting






14. 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.






15. 1. a collision domain that is a section of a LAN that is bound by bridges - routers or switches. 2. In a LAN using a bus topology - a segment is a continuous electrical circuit that is often connected to other such segments with repeaters. 3. When us






16. Data link layer term describing a device connected to a network.






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






18. The reference to text based logical interfaces on an ios device. These are accesses using telnet or ssh to perform administrative tasks. VTY lines are also called virtual type terminal.






19. A network device - typically connected to a range of LAN and WAN interfaces - that forwards packets based on their destination IP addresses.






20. Interface by magnetic signals caused by the flow of electricity. EMI can cause reduced data integrity and increased error rates on transmission channels. The physics of this process are that electrical current creates magnetic fields - which in turn






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






22. Any communication in which the sender and receiver do not prearrange for communications to occur






23. 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.






24. A network topology characterized by a central location connected to multiple hubs. In an extended star - these interconnected hubs may be connected to more hubs. It is essentially a hierarchical topology but typically is drawn with the central site i






25. In networking - this term is used in several ways. With ethernet hub and switch hardware - port is simply another name for interface - which is a physical connector in the swithc into whic a cable can be connected. With TCP and UDP - a port is a soft






26. A service or a program to look up information in the DNS






27. DNS data records. Their precise format is defined in RFC 1035. The most important fields in a resource record are Name - class - type and data.






28. 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.






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






30. A network model defined by the IETF that has been implemented on most computers and network device in the world.






31. A combination of many IP subnets and networks - as created by building a network using routers. The term internwork is used to avoid confusion with the term network - because an internetwork can include several IP networks.






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






33. Physical medium that uses glass or plastic threads to transmit data. A fiber-optic cable consists of a bundle of these threads - each of which is capable of transmitting data into light waves.






34. A popular certification method for fiber systems. The OTDR injects light into the fiber and then graphically displays the results of the detected reflected light. The OTDR measures the elapsed transit time of reflected light to calculate the distance






35. A plan - design or program of action to be followed. Sometimes an addressing plan is called an addressing SCHEME.






36. A data link layer address - for example a MAC address






37. A type of hash function that is used to produce a small - fixed size checksum of a block of data - such as a packet or a computer file. A CRC is computed and appended before transmission or storage - and verified afterward by the recipient to confirm






38. 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.






39. 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.






40. A command on many computer operating systems that discovers the IP addresses - and possibly host names - of the routers used by the network when sending a packet from one computer to another.






41. A form of signal modulation where the message information is encoded in the amplitude of series of signal pulses. It transmits data by varying the aplitunes of the individual pulses. This is now obsolete and has been replaced by pulse code modulation






42. In ethernet - a device that receives an electrical signal in one port - interprets the bits and regenerates a clean signal that it sends out all other ports of the hub. Typically it also supplies several ports - which are oftentimes RJ-45 jacks.






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






44. The portion of a binary number that carries the most weight - the one written farthest to the left. High-order bits are the 1s in the network mask.






45. Communication that uses a common clocking signal. In most synchronous communicatino - one of the communicating devices generates a clock signal into the circuit. Additional timing information is not required in the header.






46. A number used in the 802.11 header to specify the session between a wireless client and the access point.






47. The first half of a MAC address. Manufactures must ensure that the value of the OUI has been registered with the IEEE. This value identifies the manufacturer of any Ethernet NIC or interface.






48. Communication where the sender and receiver must prearrange for communications to occur; otherwise - the communication fails.






49. 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






50. Unique addresses that are public domain addresses.