Deck 12: More on Tcp-Ip

Question 1

Within an autonomous system,the organization can choose whatever routing protocol it wishes.

Answer 1

True

Question 2

In TCP fragmentation,what device does reassembly?

A)The source host.
B)A router.
C)The destination host.
D)None of the above.

Answer 2

C

Question 3

An IP address is A173:0000:0000:0000:23B7:0000:CD12:A84B.In compact form this is A173:23B7:CD12:A84B.

Answer 3

False

Question 4

________ fragmentation takes place on the source host.

A)IP
B)TCP
C)Both A and B
D)Neither A nor B

Question 5

A TCP segment begins with octet 8,658 and ends with octet 12,783.What number does the receiving host put in the acknowledgment number field of the TCP segment that acknowledges this TCP segment?

A)8,657.
B)8,658.
C)8,659.
D)12,783.
E)12,784.

Question 6

Which of the following is a distance vector routing protocol?

A)RIP.
B)OSPF.
C)Both A and B
D)Neither A nor B

Question 7

Which of the following is an interior routing protocol?

A)RIP.
B)BGP.
C)Both A and B
D)Neither A nor B

Question 8

To decide what process should receive the contents of the data field of a TCP segment,the transport layer process looks at the ________ field.

A)source port number
B)source IP address
C)destination IP address
D)protocol
E)None of the above.

Question 9

A TCP segment carries data octets 456 through 980.The following TCP segment is a supervisory segment carrying no data.What value is in the sequence number field of the latter TCP segment?

A)456.
B)457.
C)980.
D)981.
E)We cannot say.

Question 10

On what program on what computer does reassembly occur if IP packets are fragmented?

A)Transport process on the destination host.
B)Internet layer process on the destination host.
C)Internet layer process on a router.
D)Data link layer process on a router.
E)Data link layer process on the destination host.

Question 11

To decide what process should receive the contents of the data field of an IP packet,the internet layer process looks at the ________ field.

A)destination port number
B)source IP address
C)destination IP address
D)protocol
E)application

Question 12

A transport process announces an MSS of 1,024.If there are no options,how big can IP packets be?

A)536.
B)556.
C)576.
D)1,024.
E)1,064.

Question 13

In TCP fragmentation,what is fragmented?

A)The application layer message.
B)The transport layer message.
C)The internet layer message.
D)All of the above.

Question 14

Flow control in TCP depends on the ________ field.

A)acknowledgement number
B)window size
C)Both A and B
D)Neither A nor B

Question 15

IP version 6 will offer ________.

A)larger address fields to allow more IP addresses
B)a good way to add extension headers
C)Both A and B
D)Neither A nor B

Question 16

The following router forwarding table entry has the prefix -14 and the address part 10101010 10100001 10000000 10000000 (170.160.0.0).Which of the following would constitute a match?

A)10101010 00000000 00000000 00000000.
B)10101010 10100000 00000000 00000000.
C)10101010 10100001 00000000 00000000.
D)10101010 10100001 10000000 00000000.
E)10101010 10100001 10000000 10000000.

Question 17

There is a mask 1010.There is a number 1100.What is the result of masking the number?

A)1010.
B)1100.
C)0010.
D)1000.
E)1110.

Question 18

A TCP segment begins with octet 8,658 and ends with octet 12,783.What number does the sending host put in the sequence number field?

A)8,657.
B)8,658.
C)8,659.
D)12,783.
E)12,784.

Question 19

When an IP packet reaches a router that wishes to send the packet on to a subnet whose MTU is longer than the IP packet,what happens? Read carefully.

A)The router fragments the packet.
B)The subnet fragments the packet.
C)Both the router and the subnet fragment the packet.
D)The packet is not fragmented.

Question 20

When an IP packet reaches a router that wishes to send the packet on to a subnet whose MTU is shorter than the IP packet,what happens?

A)The router fragments the packet.
B)The subnet fragments the packet.
C)Both the router and the subnet fragment the packet.
D)The network fragments the packet.

Question 21

Which of the following only transmits updates?

A)RIP.
B)OSPF.
C)Both A and B

Question 22

Which of the following is delivered reliably?

A)RIP.
B)OSPF.
C)Both A and B
D)Neither A nor B

Question 23

Which of the following needs a mask to know the size of the network part in an IP address?

A)Classful IP addressing.
B)CIDR.
C)Both A and B
D)Neither A nor B

Question 24

Which of the following has good scalability?

A)RIP.
B)OSPF.
C)Both A and B
D)Neither A nor B

Question 25

In an ARP request message,the ________ is all ones.

A)IP address
B)MAC address
C)Both A and B
D)Neither A nor B

Question 26

A host wishes to send an IP packet to a router on its subnet.It knows the router's IP address.The internet layer packet it sends will be ________.

A)a RARP request
B)an ARP request
C)an IP packet
D)an ICMP echo request
E)a routing protocol message

Question 27

Which of the following sends its messages to hosts as well as to routers?

A)RIP.
B)OSPF.
C)Both A and B
D)Neither A nor B

Question 28

What class of network would have the following IP address? 11001100111111110000000010101010.

A)A.
B)B.
C)C.
D)D.
E)E.

Question 29

A router sends an ARP message to find the address of a destination host on a LAN subnet.The MAC layer address of the router is in the MAC destination address field of the ________.

A)frame carrying the ARP request message
B)frame carrying the ARP response message
C)Both A and B
D)Neither A nor B

Question 30

A router sends an ARP message in order to find the ________ address of a destination host on a LAN.

A)IP
B)MAC
C)Both A and B

Question 31

Multicasting ________.

A)is supported by Class A addresses
B)is supported by Class B addresses
C)is supported by Class C addresses
D)is supported by Class D addresses
E)is not supported within the Classful addressing system

Question 32

Multicasting is used because ________.

A)it allows a source host to reach many destination hosts in a short time
B)it reduces traffic