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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. Path through an internetwork through which packets are forwarded.






2. 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.






3. The number of various unique digits - including 0 that a positional number system uses to represent numbers. For example - in the binary system (base 2) the radix is 2. In the decimal system the radix is 10.






4. A 32-bit field in the tcp segment header that specifies the sequence number of the next byte this host expects to receive as a part of the TCP session. It is used to recognize lost packets and flow control






5. An IP address that has been registered with IANA or one of its member agencies - which guarantees that the address is globally unique. Globally unique public IP addresses can be used for packets sent through the Internet.






6. Devices at the user end of a user-network interface that serves as a data source - destination or both. DTE connects to a data network through a DCE device and typically uses clocking signals generated by the DCE. DTE includes such devices as compute






7. A 1-bit flag in the tcp header that indicates the acknowledgment field is valid.






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






9. The IP address of the originating host that is placed into the IP packet header.






10. A logical storage in a host's RAM to store arp entries.






11. A group of IP addresses that have the same value in the first part of the IP addresses - for the purpose of allowing routing to identify the group by the inital part of the addresses. IP addresses in the same subnet typically sit on the same network






12. Network protocols or technologies that do not use the acknowledgment system to guarantee reliable delivery of information






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






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






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






16. A logical network composed of all the computers and networking devices that can be reached by sending a frame to the data link layer broadcast address.






17. The forwarding of packets where the forwarding decision is taken dynamically - hop by hop - based on the conditions of downstream fowrading nodes.






18. The glass fibers inside certain cables over which light is transmitted to encode 0 and 1






19. Line code in which each bit of data is signified by at least one voltage level transition.






20. Routing that adjusts automatically to network topology or traffic changes.






21. A routing feature in which frames in an interface output queue are prioritized based on various characteristics such as packet size and interface type.






22. A general type of cable - with the cable holding twisted pairs of copper wires and the cable itself having little shielding.






23. 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.






24. A network architecture designed to eliminate network downtime cause by a single point of failure.






25. The layer 2 pdu that has been encoded by a data link layer protocol for digital transmission. Some different kinds of frames are ethernet frames and PPP frames.






26. 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






27. A group of 8 binary bits. It is similar to - but not the same as - a byte. One Application in computer network is to use octets to divide IPv4 addresses into four components






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






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






30. 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






31. The method of for finding a host's hardware address from its IPv4 network layer address.






32. A device that connects multiple network segments at the data link layer of the OSI model. Bridges were the predecessor to LAN switches.






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






34. 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.






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






36. 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






37. An application level network protocl mainly applied to shared access to files - printers - serial ports - and miscellaneous communications between nodes on a network.






38. In TCP - the process of taking a large chunk of data and breaking it into small enough pieces to fit within a TCP segment without breaking any rules about the maximum amount of data allowed in a segment.






39. A host or node that participates in some form of a group. For example - p2p technology defines a group of peers that participate jointly in the same activity - each one having a server and client component.






40. A technique used to attack an ethernet network by sending fake ARP messages to an ethernet LAN. These frames contain false MAC addresses that confuse network devices - such as switches. As a result - frames intended for one node can be mistakenly sen






41. When used generically - this term refers to end-user data along with networking headers and trailers that are transmitted through a network. When used specifically - it is end-user data - along with the network or Internet layer headers and any highe






42. The bit position in a binary number having the greatest value. The most significant bit is sometime referred to as the leftmost bit.






43. A dotted decimal number defined by the IPv4 protocol to represent a network or subnet. It represents the network that hosts reside in. Also called a network number or network ID.






44. The MAC algorithm used by ethernet devices in a shared media. The protocol requires a node wishing to transmit to listen for a carrier signal before trying to send. If a carrier is sensed - the node waits for transmission in progress to finish before






45. The physical interface transceivers. It deals with Layer 1 (the physical layer - hence the PHY) of ethernet.






46. A port on cisco devices to which a terminal or computer with a terminal emulator is connected to the network device in order to communicate and configure the network device






47. The retransmission delay used with CSMA/CD when a collision occurs. The algorithm forces each sender that detected the collisions to delay a random amount of time before attempting to retransmit.






48. The time that passes while some event occurs. In networking - latency typically refers to the time that occurs between when something is sent in a network until it is received by another device.






49. 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






50. A part of the ethernet frame that fills in the data field to ensure that the data field meets the minimum size requirement of 46 bytes.