Cisco CCNA Chapter 2

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Author:
txopie
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162131
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Cisco CCNA Chapter 2
Updated:
2012-07-11 18:49:03
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Cisco Chapter two Introduction TCP IP
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TCP/IP
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  1. What are the decimal and hexadecimal equivalants of the binary number 10011101?

    A. 159

    B. 157

    C. 185

    D. 0x9D

    E. 0xD9

    F. 0x159
    ( B &D )
  2. Which of the following allows a router to respond to an ARP request that is inteded for a remote host?

    A. Gateway DP

    B. Reverse ARP (RARP)

    C. Proxy ARP

    D. Inverse ARP (IARP)

    E. Address Resolution Protocol (ARP)
    ( C ) Proxy ARP
  3. You want to implement a mechanism that automates the IP configuration, including IP address, subnet mask, default gateway, and DNS information.  Which protocol will you use to accomplish this?

    A. SMTP

    B. SNMP

    C. DHCP

    D. ARP
    ( C ) - Dynamic Host Configuration Protocol (DHCP)
  4. What protocol is used to find the hardware address of a local device?


    A. RARP

    B. ARP

    C. IP

    D. ICMP

    E. BootP
    ( B ) - Address Resolution Protocol (ARP)
  5. Which of the following are layers in the TCP/IP model? (choose three)

    A. Application

    B. Session

    C. Transport

    D. Internet

    E. Data Link

    F. Physical
    ( A, C, & D ) 

    • Application
    • Transport
    • Internet  

          
  6. Which class of IP address provides a maximum of only 254 host addresses per network ID

    A. Class A

    B. Class B

    C. Class C

    D. Class D

    E. Class E
    ( C ) - a Class C network
  7. Which of the following describe the DHCP discover message? (choose two)

    A. It uses FF:FF:FF:FF:FF:FF as a layer 2 broadcast.

    B. It uses UDP as tje Transport layer protocol.

    C. It uses TCP as the transport layer protocol.

    D. It does not use a layer 2 destination address.
    ( A & B ) - 

    •  It uses FF:FF:FF:FF:FF:FF as a layer 2 broadcast.
    •  It uses UDP as tje Transport layer protocol.
  8. Which Layer 4 protocol is used for a telnet connection?

    A. IP

    B. TCP

    C. TCP/IP

    D. UDP

    E. ICMP
    ( B ) - Although telnet does use TCP and IP (TCP/IP), the question specially asks about layer 4, and IP works at layer 3. 

    Telnet uses TCP at layer 4
  9. Which statements are true regarding ICMP packets? (choose two)

    A. They acknowledge receipt of a TCP segment.

    B. They guarantee datagram delivery.

    C. They can provide hosts with information about network problems.

    D. They are encapsulated within IP datagrams.

    E. They are encapsulated within UDP datagrams.
    (C & D) - Internet Control Message Protocol (ICMP) is used to send error messages through the network, but they do not work alone.  Every segment or ICMP payload must be encapsulated within an IP datagram (or packet).
  10. Which of the following services use TCP? (choose three)

    A. DHCP

    B. SMTP

    C. SNMP

    D. FTP

    E. HTTP

    F. TFTP
    ( B, D, & E ) - SMTP, FTP, & HTTP use TCP.
  11. Which of the following services uses UDP? (choose three)

    A. DHCP

    B. SMTP

    C. SNMP

    D. FTP

    E. HTTP

    F. TFTP
    ( A, C & F ) - Explanation: DHCP, SNMO, & TFTP use UDP.

    SMTP, FTP & HTTP use TCP.
  12. Which of the following are TCP?IP protocols used at the Application layer of the OSI model? (choose three)

    A. IP

    B. TCP

    C. Telnet

    D. FTP

    E. TFTP
    ( C, D & E ) - Telnet, file transfer protocol (FTP), and trinval FTP (TFTP) are all Application layer protocols. 

    IP is a Network Layer protocol.  Transmission Control Protocol (TCP) is a Transport layer protocol.
  13. If you use either Telnet or FTP, which is the highest layer you are using to transmit data?

    A. Application

    B. Presentation

    C. Session

    D. Transport
    ( A ) - Both FTP & Telnet use TCP at the Transport layer; however, they both are Application layer protocols, so the Appplication layer is the best answer for this question.
  14. The DoD model (also called the TCP/IP stack) has four layers.  Which layers of the DoD model is equivalent to the Network Layer of the OSI model?

    A. Application

    B. Host-to-host

    C. Internet

    D. Network access
    ( C ) - The four layers of the TCP/IP stack (also called the DoD model) are:

    • Application/Process
    • Host-to-host
    • Internet
    • Network Access

    • The Internet layer is equivalent to the Network Layer of the OSI model.  
    •   
  15. Which two of the following are private IP addresses?

    A. 12.0.0.1

    B. 168.172.19.39

    C. 172.20.14.36

    D. 172.33.194.30

    E. 192.168.24.43
    ( C & E )

    Class A private address range is 10.0.0.0 - 10.255.255.255

    Class B private address range is 172.16.0.0 - 172.31.255.255

    Class C private address range is 192.168.0.0 - 192.168.255.255
  16. What layer in the TCP/IP stack is equivalent to the Transport Layer of the OSI model?

    A. Application

    B. Host-to-host

    C. Internet

    D. Network access
    • ( B ) - The four layes of the TCP/IP stack ( also called DoD model) are
    • Application/Process
    • Host-to-host
    • Internet
    • Network Access


    The host-to-host layer is equivalent to the Transport Layer of the OSI model.  
  17. Which statements are true regarding ICMP packets? (choose two)

    A. ICMP guarantees datagram delivery.

    B. ICMP can provide hosts with information about network problems.

    C. ICMP is encapsulated within IP datagrams.

    D. ICMP is encapsulated within UDP datagrams
    ( B & C ) - ICMP is used for diagnostic and destination unreachable messages.  ICMP is encapsulated within IP datagrams, and because it is used for diagnostic, it will provide hosts with information about network problems.
  18. What is the address range of a class B network address in binary?

    A. 01xxxxx

    B. 0xxxxxxx

    C. 10xxxxxx

    D. 110xxxxx
    ( C ) - The range of a Class B network address is 128-191. 

    This makes our binary range 10xxxxxx.
  19. Which of the following protocols uses both TCP & UDP?

    A. FTP

    B. SMTP

    C. Telnet

    D. DNS
    ( D ) - DNS uses TCP for zone exchanges between servers and UDP when a client is trying to resolve a hostname to an IP address.
  20. What is the Class C address range in decimal & binary?
    192-223

    110xxxxx
  21. What layer of the DoD model is equivalent to the Transport layer of the OSI model?
    Host-to-host
  22. What is the valid range of a class A network address?
    1-126
  23. What is the 127.0.0.1 address used for?
    Loopback or diagnostics
  24. How do you find the network address from a listed IP address?
    Turn all host bits off.
  25. How do you find the broadcast address from a listed IP address?
    Turn all host bits on.
  26. What is the Class A private IP address space?
    10.0.0.0 through 10.255.255.255
  27. What is the Class B private IP address space?
    172.16.0.0 through 172.31.255.255
  28. What is the Class C private IP address space?
    192.168.0.0 through 192.168.255.255
  29. What are all the available characters that you can use in hexadecimal addressing?
    0-9 and A, B, C, D, E, and F

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