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1 | |
A best-effort delivery service such as IPv4 includes _______. |
|
| | A) | error checking |
| | B) | error correction |
| | C) | datagram acknowledgment |
| | D) | none of the above |
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2 | |
In IPv4 header, an HLEN value of decimal 10 means _______. |
|
| | A) | there are 10 bytes of options |
| | B) | there are 40 bytes of options |
| | C) | there are 10 bytes in the header |
| | D) | there are 40 bytes in the header |
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3 | |
In IPv4, what is the value of the total length field in bytes if the header is 28 bytes and the data field is 400 bytes? |
|
| | A) | 428 |
| | B) | 407 |
| | C) | 107 |
| | D) | 427 |
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4 | |
In IPv4, what is the length of the data field given an HLEN value of 12 and total length value of 40,000? |
|
| | A) | 39,988 |
| | B) | 40,012 |
| | C) | 40,048 |
| | D) | 39,952 |
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5 | |
An IPv4 datagram is fragmented into three smaller datagrams. Which of the following is true? |
|
| | A) | The do not fragment bit is set to 1 for all three datagrams. |
| | B) | The more fragment bit is set to 0 for all three datagrams. |
| | C) | The identification field is the same for all three datagrams. |
| | D) | The offset field is the same for all three datagrams. |
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6 | |
In IPv4, if the fragment offset has a value of 100, it means that _______. |
|
| | A) | the datagram has not been fragmented |
| | B) | the datagram is 100 bytes in size |
| | C) | the first byte of the datagram is byte 100 |
| | D) | the first byte of the datagram is byte 800 |
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7 | |
In IPv4, what is needed to determine the number of the last byte of a fragment? |
|
| | A) | Identification number |
| | B) | Offset number |
| | C) | Total length |
| | D) | (b) and (c) |
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8 | |
The IPv4 header size _______. |
|
| | A) | is 20 to 60 bytes long |
| | B) | is always 20 bytes long |
| | C) | is always 60 bytes long |
| | D) | depends on the MTU |
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9 | |
Which of the following is a necessary part of the IPv6 datagram? |
|
| | A) | Base header |
| | B) | Extension header |
| | C) | Data packet from the upper layer |
| | D) | (a) and (c) |
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10 | |
In IPv6, the _______ field in the base header restricts the lifetime of a datagram. |
|
| | A) | version |
| | B) | next-header |
| | C) | hop limit |
| | D) | neighbor-advertisement |
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11 | |
The ________ protocol is the transmission mechanism used by the TCP/IP suite. |
|
| | A) | ARP |
| | B) | IP |
| | C) | RARP |
| | D) | none of the above |
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12 | |
IP is _________ datagram protocol. |
|
| | A) | an unreliable |
| | B) | a connectionless |
| | C) | both a and b |
| | D) | none of the above |
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13 | |
The term ________ means that IP provides no error checking or tracking. IP assumes the unreliability of the underlying layers and does its best to get a transmission through to its destination, but with no guarantees. |
|
| | A) | reliable delivery |
| | B) | connection-oriented delivery |
| | C) | best-effort delivery |
| | D) | none of the above |
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14 | |
In IPv4, an HLEN value of decimal 10 means _______. |
|
| | A) | there are 10 bytes of options |
| | B) | there are 40 bytes of options |
| | C) | there are 40 bytes in the header |
| | D) | none of the above |
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15 | |
In IPv4, which field or bit value unambiguously identifies the datagram as a fragment? |
|
| | A) | Do not fragment bit ? 0 |
| | B) | More Fragment bit ? 0 |
| | C) | Fragment offset = 1000 |
| | D) | none of the above |
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16 | |
The IPv4 header size _______. |
|
| | A) | is 20 to 60 bytes long |
| | B) | is 20 bytes long |
| | C) | is 60 bytes long |
| | D) | none of the above |
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17 | |
In IPv4, when a datagram is encapsulated in a frame, the total size of the datagram must be less than the _______. |
|
| | A) | MUT |
| | B) | MAT |
| | C) | MTU |
| | D) | none of the above |
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18 | |
The IPv4 header field formerly known as the service type field is now called the _______ field. |
|
| | A) | IETF |
| | B) | checksum |
| | C) | differentiated services |
| | D) | none of the above |
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19 | |
In IPv6, options are inserted between the _________ and the ___________ data. |
|
| | A) | base header; extension header |
| | B) | base header; upper-layer data |
| | C) | base header; frame header |
| | D) | none of the above |
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20 | |
IPv6 allows _________ security provisions than IPv4. |
|
| | A) | more |
| | B) | less |
| | C) | the same level |
| | D) | none of the above |
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21 | |
In IPv6, when a datagram needs to be discarded in a congested network, the decision is based on the _______ field in the base header. |
|
| | A) | hop limit |
| | B) | priority |
| | C) | next header |
| | D) | none of the above |
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22 | |
In IPv6, the _______ field in the base header and the sender IP address combine to indicate a unique path identifier for a specific flow of data. |
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| | A) | flow label |
| | B) | next header |
| | C) | hop limit |
| | D) | destination IP address |