Deck 9: Tcp-Ip Internetworking

Question 1

When a router forwards incoming packets closer to their destination hosts,this is ________.

A)routing
B)switching
C)bridging
D)hopping

Answer 1

A

Question 2

UDP is reliable.

Answer 2

False

Question 3

TCP is ________.

A)connectionless
B)unreliable
C)Both A and B
D)Neither A nor B

Answer 3

D

Question 4

In a network mask,the 1s correspond to the ________.

A)network part
B)subnet part
C)host part
D)None of the above.

Question 5

An internal router only connects different IP ________.

A)subnets
B)networks
C)Both A and B
D)Neither A nor B

Question 6

In a subnet mask,the 1s correspond to the ________.

A)network part
B)subnet part
C)host part
D)None of the above.

Question 7

________ operates at the transport layer.

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

Question 8

A mask has ________ bits.

A)8
B)16
C)24
D)32
E)The number of bits varies.

Question 9

When a network mask is applied to any IP address on the network,the result is the IP address' network part followed by zeros.

Question 10

Which of the following is reliable?

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

Question 11

Which of the following is one of the three parts of an IP address?

A)Subnet part.
B)Mask part.
C)Both A and B
D)Neither A nor B

Question 12

UDP is ________.

A)connection-oriented
B)unreliable
C)Both A and B
D)Neither A nor B

Question 13

The network part of an IP address is ________ bits long.

A)8
B)16
C)24
D)32
E)The size of the network part varies.

Question 14

A border router's main job is to connect different subnets in the same network.

Question 15

TCP is reliable.

Question 16

Which of the following is connectionless?

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

Question 17

Which of the following is connectionless?

A)TCP.
B)UDP.
C)Both A and B
D)Neither A nor B

Question 18

Which of the following is reliable?

A)TCP.
B)UDP.
C)Both A and B
D)Neither A nor B

Question 19

The total length of an IP address is ________ bits.

A)8
B)16
C)24
D)32
E)The length of IP addresses varies.

Question 20

________ operates at the internet layer.

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

Question 21

If -14 is a subnet mask,how many bits are there in the host part?

A)8.
B)14.
C)16.
D)18.
E)We cannot say.

Question 22

For a given number of addresses,a(n)________ will have fewer rows.

A)Ethernet switching table
B)routing table
C)Both will have about the same number of rows.

Question 23

In a routing table,a row is a route for a single IP address.

Question 24

If -14 is a subnet mask,how many bits are there in the network part?

A)8.
B)14.
C)16.
D)18.
E)We cannot say.

Question 25

If -14 is a subnet mask,how many bits are there in the subnet part?

A)8.
B)14.
C)16.
D)18.
E)We cannot say.

Question 26

For a given volume of traffic,which are more expensive?

A)Switches.
B)Routers.
C)Both of the above are about equally expensive.

Question 27

If -14 is the network mask,how many bits are there in the network part?

A)8.
B)14.
C)16.
D)18.
E)We cannot say.

Question 28

Routers usually are connected in a ________ topology.

A)point-to-point
B)mesh
C)hierarchical
D)ring

Question 29

The router selects the best match row in Step ________.

A)1
B)2
C)3
D)4

Question 30

When a packet arrives,the router should look for matches in ALL rows in the routing table.

Question 31

In a(n)________ table,there is a row for each address.

A)Ethernet switch
B)router
C)Both A and B
D)Neither A nor B

Question 32

A(n)________ must find the best-matching row in its ________ table by comparing several row matches.

A)Ethernet switch,switching
B)router,routing
C)Both A and B

Question 33

In the mask -14,how many 1s are there?

A)8.
B)16.
C)24.
D)255.
E)None of the above.

Question 34

The default row ________.

A)always has the mask /16
B)will always match the IP address of an incoming packet
C)Both A and B
D)Neither A nor B

Question 35

If -14 is the network mask,how many bits are there in the subnet part?

A)8.
B)14.
C)16.
D)18.
E)We cannot say.

Question 36

In the mask 255.255.255.0,how many 1s are there?

A)8.
B)16.
C)24.
D)255.
E)None of the above.

Question 37

A row in a routing table has the destination 10.8.0.0 and the mask -24.It is a match for 10.8.6.7.

Question 38

If -14 is the network mask,how many bits are there in the host part?

A)8.
B)14.
C)16.
D)18.
E)We cannot say.

Question 39

The default row will never be selected as the best match row.

Question 40

Row 2707 has the mask -16 and the reliability metric 20.Row 4400 has the mask -14 and the cost reliability 10.Which row will the router choose if both are matches?

A)2707.
B)4400.
C)Either A or B
D)The router will choose the default row.

Question 41

Fragmentation is ________.

A)very common
B)suspicious because it is often used by hackers
C)Both A and B
D)Neither A nor B

Question 42

ARP operates at the ________ layer.

A)physical
B)data link
C)internet
D)transport
E)application

Question 43

The main version of Internet Protocol in use today is IP version ________.

A)1
B)2
C)4
D)5
E)6

Question 44

ARP is used to find the destination data link layer destination addresses of ________.

A)destination hosts
B)routers
C)Both A and B
D)Neither A nor B

Question 45

The use of options in IP is ________.

A)very common
B)suspicious because they are often used by hackers
C)Both A and B
D)Neither A nor B

Question 46

A router must use the ARP process ________.

A)when a new router comes online
B)when a router goes offline
C)whenever it forwards an IP packet
D)whenever it forwards an IP packet to a host that is not in its ARP cache

Question 47

Routers send packets out ________.

A)ports
B)connections
C)interfaces
D)plugs

Question 48

Row 2707 has the mask -16 and the speed metric 20.Row 4400 has the mask -16 and the speed metric 10.Which row will the router choose if both are matches?

A)2707.
B)4400.
C)Either A or B
D)The router will choose the default row.

Question 49

Deciding how to send the packet back out is Step ________ in the routing process.

A)1
B)2
C)3
D)4

Question 50

ARP operates at the data link layer.

Question 51

An IP packet's protocol field value is 1.The data field contains a(n)________ message.

A)TCP
B)UDP
C)ICMP
D)DNS
E)Any of the above.

Question 52

The new version of Internet Protocol that is coming into use is IP version ________.

A)1
B)2
C)4
D)5
E)6

Question 53

A router will discard a packet if the TTL value reaches ________.

A)0
B)1
C)128
D)the maximum value in the router's configuration file
E)the minimum value in the router's configuration file

Question 54

In packet fragmentation and reassembly,the ________ field is used.

A)version
B)identification
C)TCP
D)protocol
E)Diff-Serv

Question 55

Compared to normal routing,decision caching is ________.

A)faster
B)less dangerous
C)Both A and B

Question 56

To deliver an arriving packet to a destination host on a subnet connected to router,the router needs to know the destination host's ________.

A)IP address
B)data link layer address
C)Both A and B
D)Neither A nor B

Question 57

In an IP packet,the ________ field value tells the type of message contained in the IP packet's data field.

A)data
B)next-hop
C)next-header
D)protocol
E)None of the above.

Question 58

What does a router do with ARP request messages?

A)It broadcasts them.
B)It sends them directly to the destination host.
C)Both A and B
D)Neither A nor B

Question 59

The router selects a row in which the next-hop router is labeled local.The router will send the packet to ________.

A)the default router
B)the local next-hop router
C)the local device
D)None of the above.

Question 60

The next-hop router in the default row is called the default router.

Question 61

For a Windows host,what kind of port number is 668?

A)A well-known port number.
B)An ephemeral port number.
C)Either A or B
D)None of the above.

Question 62

A Windows host sends a TCP segment with source port number 47 and destination port number 3270.

A)The source host is a server.
B)The source host is a client.
C)Either A or B

Question 63

Servers use ________ source port numbers as source port numbers when they transmit.

A)well-known
B)ephemeral
C)Either A or B

Question 64

The main benefit of IPv6 over IPv4 is ________.

A)two more bits in the IP address
B)two more bytes in the IP address
C)the ability to have quality-of-service guarantees
D)the ability to support more possible hosts
E)lower cost

Question 65

A TCP ________ segment is a request to close a connection.

A)FIN
B)ACK
C)Close
D)Disconnect

Question 66

If someone says that a 1-bit flag is set,this means that it is given the value ________.

A)0
B)1
C)Either of the above.

Question 67

One-bit fields are called ________ fields.

A)digital
B)binary
C)flag
D)ACK
E)None of the above.

Question 68

Clients use ________ source port numbers as source port numbers when they transmit.

A)well-known
B)ephemeral
C)Either A or B

Question 69

For a Windows host,what kind of port number is 953?

A)A well-known port number.
B)An ephemeral port number.

Question 70

If the ACK bit is set,the acknowledgment number field MUST have a value.

Question 71

TCP messages are called ________.

A)frames
B)data fields
C)packets
D)segments
E)fragments

Question 72

Which of the following segments is not acknowledged?

A)FIN.
B)RST.
C)Both of the above are acknowledged.
D)Neither A nor B is acknowledged.

Question 73

A Windows host sends a TCP segment with source port number 1200 and destination port number 25.The sending host is a(n)________.

A)client
B)TCP server
C)webserver
D)e-mail server

Question 74

For a Windows host,what kind of port number is 3030?

A)A well-known port number.
B)An ephemeral port number.
C)Either A or B
D)None of the above.

Question 75

Four-way closes use ________ segments.

A)FIN
B)RST
C)Both A and B
D)Neither A nor B

Question 76

A Windows host sends a TCP segment with source port number 25 and destination port number 1200.The sending host is a(n)________.

A)client
B)TCP server
C)webserver
D)e-mail server

Question 77

Which of the following may drive the adoption of IPv6?

A)A growing number of hosts in Asia.
B)A growing number of mobile devices.
C)Both A and B
D)Neither A nor B

Question 78

128.171.17.13:1234 is ________.

A)an IP address
B)a port number
C)a socket
D)None of the above.

Question 79

A Windows host sends a TCP segment with source port number 47 and destination port number 3270.

A)The destination host is a server.
B)The destination host is a client.
C)Either A or B

Question 80

To handle internetwork transmission control tasks that the IP protocol cannot handle,the IETF created TCP.