CCNA Study Ref Basics #3.txt

Card Set Information

CCNA Study Ref Basics #3.txt
2010-10-27 16:44:53
Cisco CCNA

Cisco Study Basics
Show Answers:

  1. show processes cpu?
    Display = Process name/ Process ID -- CPU utilization over 5secs/One min & 5 mins
  2. OSI?
  3. Which layer of the OSI model defines Token Ring and Ethernet networking standards?
    Layer 2 � topology is defined in this layer
  4. Segment length & Speed of 10Base2 (50 ohm coax)?
    185 Meters � 10 Mbps
  5. Segment length & Speed of 10Base5 (50 ohm coax)?
    500 meters � 10 Mbps
  6. Segment length & Speed of 10BaseT (Cat 3 UTP)
    100 meters � 100 Mbps
  7. Segment length & Speed of 100BaseT (Cat 5 UTP)
    100 meters � 1,000 Mbps
  8. Segment length & Speed of MM Fiber?
    2,000 meters � 1,000 Mbps
  9. Segment length & Speed of SM Fiber?
    100,000 meters � 1,000 Mbps
  10. Maximum distance Cat 5 horizontal cabling run?
    90 meters
  11. Patch cords at the horizontal cross-connect are not to exceed?
    6 meters
  12. Patch cords from the wall to the workstation are not to exceed?
    3 meters
  13. What layer are these devices: network adapter, network cable media, repeaters, hubs?
    Physical � Layer 1
  14. What layer establishes and managers communications between computers?
    The session layer builds and manages communications between 2 devices.
  15. Name the layer that defines Ethernet & Token Ring?
    Data Link � Layer 2
  16. The transport layer creates ____, the network layer creates ____, Data Link layer creates ____.
    • Transport = segments; network = packets; data link = frames; Physical layer = bits
    • All are called PDU
  17. The distance limit in a wire where the signal begins to fade is called?
  18. Name the most commonly used wiring standard for network media?
    EIA/TIA 568a & 568b
  19. Name Cisco�s 3 tiers for hierarchical network design?
    Core, Distribution, Access
  20. How does one keep traffic local and reduce collision domains?
    Lan Segmentation
  21. What device can connect 2 or more LANS using different protocols?
  22. Logical addresses are used by a router for what reason?
    To segment domains
  23. Name the four types of memory used in a Cisco router?
  24. What type of memory stores the Cisco IOS?
  25. Where is the startup configuration stored?
  26. What type of memory stores the operating system image and microcode?
  27. What protocol allows directly connected Cisco devices to learn about each other?
    CDP (proprietary)
  28. Name the default hold time for CDP?
    180 secs (3 mins)
  29. List 4 reasons to segment a network?
    Keep local traffic local, increase available bandwidth to each user, Reduce collisions, reduce distance limitation.
  30. Routers can?
    • Segment a LAN that includes different types of media
    • Segment a LAN using different protocols (provide those protocols are all routable)
    • Increases latency because it examines packets before sending.
    • Can provide more than one active link to a destination.
  31. Where is the running config stored?
    RAM/DRAM � also OS, routing tables and other active programs
  32. In what part of memory are these functions stored�.POST, Bootstrap, start-up/power-up utilities, CIOS?
  33. Which of the following is NOT a Transport layer protocol � TCP, ARP, UDP, SPX?
    ARP is a Data Link Layer protocol
  34. SPX is a conection-less or connection-oriented protocol?
    SPX is a connection-oriented protocol that provides reliable delivery of packets
  35. A protocol that transmits data over a virtual circuit and has a process for error-recovery is:?
  36. Which of the following protocols or standards is not connection-oriented (TCP, SPX, IPX, X.25) ?
    IPX is a connectionless protocol
  37. Only this type protocols implement error-recovery?
    Connection-oriented � error recovery protocols also require an ack to be sent to the sender using information from the PDU header
  38. Which of the following is NOT an error-checking method (parity bit, hash total, checksum, CRC)?
    Hash total is a method used to determinee a checksum but it is NOT an error checking method
  39. Which of the following is NOT a flow control method (buffering, unbuffered, windowing, congestion avoidance)?
    Unbuffered doesn�t exist -- Buffering , windowing and congestion avoidance are basic flow control methods
  40. Name the 2 forms of parity bit error checking used to determine whether the correct number of bits in a transmission were received?
    Networking parity error checking is EVEN or ODD parity.
  41. Which of the following is NOT a function of the Transport Layer ( Segment and assemble upper-layer applications, transport segments from one host to another, error-recovery, routing) ?
    Routing is a network layer function. Transport layer ALSO establishes end-to-end operations
  42. The session layer services chiefly what other layer and what protocol is found there?
    It services the presentation layer and NFS and SQL reside here
  43. UDP is connectionless protocol T/F?
  44. ASCII, EBCDIC, JPG & MPG are found at the Presentation Layer T/F?
  45. Buzz words for this layer are path, route & logical addressing ?
    Layer 3 � Network layer
  46. What layer is where the hardware address (MAC) is found and where NIC, bridges and switches operate?
    Layer 2 � Data Link Layer
  47. Name examples of ROUTED protocols?
    IP, IPX, AppleTalk
  48. Name examples of ROUTING protocols?
    Only used between routers
  49. Explain the difference between ROUTED and ROUTING protocols?
    RoutING protocol is used to help routers building and maintaining routing tables. RoutED protocols are used to identify the network to which a host belongs and the host (require and addressing scheme)
  50. Given an IP address and subnet mask identify the subnet ID of that host, the last USABLE address on that subnet, the subnet broadcast address, and the number of possible subnets and hosts per subnet.
  51. Given an dotted decimal form --- identify the bit count?
    Example: = /28
  52. Given a class address indicate which bits must be on / off (Class A, B & C)?
    Example Class B has a 10 in the first 2 bits.
  53. Name the 3 classes of routing protocols and list examples of each?
    (Distance Vector, Link State & Hybrid) OSPF = Link State, EIGRP = Hybrid, Everything else is distance vector e.g. IGRP and RIP
  54. Of RIP and IGRP which has a lower administrative distance?
    Depends �remember static route always is one
  55. Know how to configure RIP & EIGRP?
  56. Which routing protocol uses Bandwidth as its routing metric?
  57. What is the command to display configured DLCI�s on a Frame Relay router?
    Sh frame-relay pvc
  58. Explain the troubleshooting of pinging local loopback address (, NIC card address and another host address?
    Successful loopback ping means TCP/IP protocol stack has initialized properly, successful NIC card address ping means NIC card is working. Successful ping to another host indicates connectivity.
  59. Speaking of an ACL, what numbers indicate a standard access list?
  60. Speaking of an ACL, what numbers indicate an extended IP access list?
  61. Speaking of an ACL, what numbers indicate an standard IPX access list?
  62. Speaking of an ACL, what numbers indicate an extended IPX access list?
  63. Speaking of an ACL, what numbers indicate an IPX SAP filter?
  64. List two commands to monitor access lists and explain each?
    Show access-lists (shows actual list) and show ip interface (shows placement of list and the direction in which they will work)
  65. In a switched environment a full-duplex interface will experience no collisions T/F?
  66. In a switched environment a half-duplex interface will experience collisions T/F?
    True..collisions are experienced between transmit and receive
  67. Excessive broadcasts are a layer 2 problem (T/F)?
  68. Explain where the following configs are stored in a router (startup-config, running-config, IOS image)?
    Startup = NVRAM, Running = RAM, IOS Image = FLASH
  69. Can you configure at this prompt router> (Y/N)?
    No ..this is not in a config mode
  70. Upon boot a router�s IOS is copied to _____memory and the startup config is copied to ____ memory?
    IOS = Flash, startup = NVRAM