CCNA 1 Discovery Version 4.0 Module 5

Module 5 - Exam Answers

 1. How large are IPv4 addresses?

  8 bits
  16 bits
  **32 bits
  64 bits
  128 bits

 

2. Refer to the graphic. A user at the workstation cannot connect to the server. All cables have been tested and are working and all devices have IP addressing. However, the user cannot ping the server. What is causing the problem?

  The router interface does not have a default gateway.
  The switch does not have an IP address and default gateway.
  **The workstation and server are on different logical networks.
  The workstation does not know the MAC address of the switch.

 

3. Which part of an IP address identifies a specific device on a network?

  first two octets
  third and fourth octets
  network portion
  **host portion
  only the fourth octet

 

4. Given a host with the IP address 172.32.65.13 and a default subnet mask, to which network does the host belong?

  172.32.65.0
  172.32.65.32
  **172.32.0.0
  172.32.32.0

 

5. Which default subnet mask provides the most host bits?

  **255.0.0.0
  255.255.0.0
  255.255.255.0
  255.255.255.252

 

6. How many bits are available for Class B host IP addresses using a default subnet mask?

  4
  8
  **16
  24

 

7. How many usable hosts are available given a Class C IP address with the default subnet mask?

  **254
  255
  256
  510
  511
  512

 

8. Assuming a default mask, which portion of the IP address 175.124.35.4 represents the host?

  175.124
  **35.4
  .4
  124.35.4
  175.124.35

 

9. Which of the following are private IP addresses? (Choose three.)

  **10.1.1.1
  172.32.5.2
  192.167.10.10 

  **172.16.4.4
  **192.168.5.5
  224.6.6.6

 

10. What destination IP address is used in a unicast packet?

  **a specific host
  a group of hosts
  the default gateway
  the network broadcast address

 

11. What is the destination MAC address in a multicast Ethernet frame?

  the MAC address of the sending host
  the MAC address of the destination host
  **an address that begins with 01-00-5E in hexadecimal
  a 48-bit hexadecimal address expressed as FF-FF-FF-FF-FF-FF

 

12. Yvonne is talking to her friend on the phone. What type of message is this?

  broadcast
  simulcast
  multicast
  **unicast

 

13. What information must be included within a unicast message for it to be delivered on an Ethernet network?

  MAC and IP addresses for the default router
  IP address and subnet mask of the default gateway
  MAC and IP addresses that correspond to a destination group
  **MAC and IP addresses that correspond to a specific destination host

 

14. A PC obtains its IP address from a DHCP server. If the PC is taken off the network for repair, what happens to the IP address configuration?

  The configuration is permanent and nothing changes.
  The address lease is automatically renewed until the PC is returned.
  **The address is returned to the pool for reuse when the lease expires.
  The configuration is held by the server to be reissued when the PC is returned.

 

15. Which type of server dynamically assigns an IP address to a host?

  ARP
  **DHCP
  DNS
  RARP

 

16. Which three statements describe a DHCP Discover message? (Choose three.)

  The source MAC address is 48 ones (FF-FF-FF-FF-FF-FF).
  **The destination IP address is 255.255.255.255.
  The message comes from a server offering an IP address.
  **The message comes from a client seeking an IP address.
  **All hosts receive the message, but only a DHCP server replies.
  Only the DHCP server receives the message.

 

17. Refer to the graphic. A host connects to a Linksys integrated router that is also a DHCP server and receives an IP address from it. Which address does the host need to access the ISP and the Internet?

  IP address of the destination host
  public gateway IP address of the ISP
  external IP address of the integrated router that connects to the ISP
  *internal IP address of the integrated router that connects to the local network

 

18. Which statement is true concerning private IP addresses?

  ensures that two networks separated by the Internet use unique IP network numbers
  allows internal hosts to communicate with servers across the Internet
  **solves the issue of a finite number of available public IP addresses
  allows for ISPs to be able to quickly determine network location

 

19. What is one of the purposes of NAT?

  filters network traffic based on IP address ranges
  **prevents external users from detecting the IP addresses used on a network
  inspects traffic that might be harmful or used in an attack against the network
  translates IP addresses into easy-to-remember domain names

 

20. Which two statements describe packets that are sent through a Linksys integrated router using NAT? (Choose two.)

  Packets that are sent to any destination need to be translated.
  Packets that are sent to hosts on the same network need to be translated.
  **Packets that are sent to a destination outside the local network need to be translated.
  Packets that are sent to a destination outside a local network do not need to be translated.
  **Packets that are sent between hosts on the same local network do not need to be translated.

 

21. Refer to the graphic. NAT and DHCP are installed on the Linksys integrated router. Which IP address is most likely to be assigned to the local computer, Host1?

  **10.0.0.17
  128.107.1.2
  192.135.250.0
  209.165.201.1