2013 Latest 640-802 Pass4sure Free Tests 51-60




1.       QUESTION

Which statement is correct regarding the operation of DHCP?


A.     A DHCP client uses a ping to detect address conflicts.

B.     A DHCP server uses a gratuitous ARP to detect DHCP clients.

C.     A DHCP client uses a gratuitous ARP to detect a DHCP server.

D.     If an address conflict is detected, the address is removed from the pool and an administrator must resolve the conflict.

E.      If an address conflict is detected, the address removed from the pool for an amount of time configurable by the administrator.

F.      If an address conflict is detected, the address is removed from the pool and will not be reused until server is rebooted.


Answer: E



2.       QUESTION

Acknowledgment, Sequencing, and Flow control are characteristics of which OSI layer?


A.     Layer 2

B.     Layer 3

C.     Layer 4

D.     Layer 5

E.      Layer 6

F.      Layer 7


Answer: C



3.       QUESTION

A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the nework administrator is using for this operation?


A.     application

B.     presentation

C.     session

D.     transport

E.      internet

F.      data link


Answer: A



4.       QUESTION

A TCP/IP Transfer is diagrammed in the exhibit.

A window size of three has been negotiated for this transfer. Which message will be returned from the receiver to the sender as part of this TCP/IP transfer?




A.     Send ACK 1-3

B.     Send ACK 3

C.     Send ACK 4

D.     Send ACK 4-6

E.      Send ACK 6

F.      Send ACK 7


Answer: C



5.       QUESTION

A receiving host computes the checksum on a frame and determines that the frame is damaged. The frame is then discarded. At which OSI layer did this happen?


A.     session

B.     network

C.     physical

D.     data link

E.      transport


Answer: D



6.       QUESTION

Which of the following protocols uses both TCP and UDP ports?


A.     SMTP

B.     Telnet

C.     FTP

D.     DNS


Answer: D



7.       QUESTION

DNS servers provide what service?


A.  They run a spell check on host names to ensure accurate routing

B.  They convert domain names into IP address

C.  Given an IP address, they determine the name of the host that is sought

D.  They map individual hosts to their specific IP addresses


Answer: B



8.       QUESTION

Which of the following are associated with the application layer of the OSI model? (Choose two.)


A.      ping

B.      Telnet

C.      FTP

D.      TCP

E.       IP


Answer: BC



9.       QUESTION

Refer to the graphic:


Host A is communicating with the server. What will be the destination MAC address of the frames sent by Host A to the server?


A.  the MAC address of router interface e0

B.  the MAC address of router interface e1

C.  the MAC address of the server network interface

D.  the MAC address of the network interface of Host A


Answer: A




How does a DHCP server dynamically assign IP address to host?


A.     Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.

B.     Addresses are assigned for a fixed period of time. At the end of period, a new quest for an address must be made, and another address is then assigned.

C.     Addresses are leased to host. A host will usually keep the same address by periodically contacting the DHCP sever to renew the lease.

D.     Addresses are permanently assigned so that the host uses the same address at all times.


Answer: C


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