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1 | |
Why was the OSI model developed? |
| | A) | manufacturers disliked the TCP/IP protocol suite |
| | B) | the rate of data transfer was increasing exponentially |
| | C) | standards were needed to allow any two systems to communicate |
| | D) | None of the choices are correct |
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2 | |
The _______ model shows how the network functions of a computer ought to be organized. |
| | A) | CCITT |
| | B) | OSI |
| | C) | ISO |
| | D) | ANSI |
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3 | |
The physical layer is concerned with the movement of _______ over the physical medium. |
| | A) | programs |
| | B) | dialogs |
| | C) | protocols |
| | D) | bits |
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4 | |
The OSI model consists of _______ layers. |
| | A) | three |
| | B) | five |
| | C) | seven |
| | D) | eight |
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5 | |
In the OSI model, as a data packet moves from the lower to the upper layers, headers are _______. |
| | A) | added |
| | B) | removed |
| | C) | rearranged |
| | D) | modified |
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6 | |
In the OSI model, when data is transmitted from device A to device B, the header from A's layer 5 is read by B's _______ layer. |
| | A) | physical |
| | B) | transport |
| | C) | session |
| | D) | presentation |
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7 | |
In the OSI model, which layer functions as a liaison between user support layers and network support layers? |
| | A) | network layer |
| | B) | physical layer |
| | C) | transport layer |
| | D) | session layer |
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8 | |
In the OSI model, what is the main function of the transport layer? |
| | A) | node-to-node delivery |
| | B) | process-to-process message delivery |
| | C) | synchronization |
| | D) | updating and maintenance of routing tables |
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9 | |
In the OSI model, encryption and decryption are functions of the ________ layer. |
| | A) | transport |
| | B) | session |
| | C) | presentation |
| | D) | application |
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10 | |
In the OSI model, which of the following is an application layer service? |
| | A) | network virtual terminal |
| | B) | file transfer, access, and management |
| | C) | mail service |
| | D) | All of the choices are correct |
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11 | |
When a host on network A sends a message to a host on network B, which address does the router look at? |
| | A) | port |
| | B) | logical |
| | C) | physical |
| | D) | None of the choices are correct |
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12 | |
The ______ layer is responsible for moving frames from one hop (node) to the next. |
| | A) | physical |
| | B) | data link |
| | C) | transport |
| | D) | None of the choices are correct |
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13 | |
The ______ layer adds a header to the packet coming from the upper layer that includes the logical addresses of the sender and receiver. |
| | A) | physical |
| | B) | data link |
| | C) | network |
| | D) | None of the choices are correct |
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14 | |
The_________ layer is responsible for the delivery of a message from one process to another. |
| | A) | physical |
| | B) | transport |
| | C) | network |
| | D) | None of the choices are correct |
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15 | |
The Internetworking Protocol (IP) is a ________ protocol. |
| | A) | reliable |
| | B) | connection-oriented |
| | C) | reliable and connection-oriented |
| | D) | None of the choices are correct |
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16 | |
__________ provides full transport layer services to applications. |
| | A) | TCP |
| | B) | UDP |
| | C) | ARP |
| | D) | None of the choices are correct |
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17 | |
The ________ address, also known as the link address, is the address of a node as defined by its LAN or WAN. |
| | A) | port |
| | B) | physical |
| | C) | logical |
| | D) | None of the choices are correct |
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18 | |
Ethernet uses a ______ physical address that is imprinted on the network interface card (NIC). |
| | A) | 32-bit |
| | B) | 64-bit |
| | C) | 6-byte |
| | D) | None of the choices are correct |
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19 | |
Which of the following can be an Ethernet physical address? |
| | A) | 01:02:01:2C:4B |
| | B) | 07:01:02:01:2C:4B:2C |
| | C) | 07:01:02:01:2C:4B |
| | D) | None of the choices are correct |
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20 | |
A port address in TCP/IP is ______ bits long. |
| | A) | 32 |
| | B) | 48 |
| | C) | 16 |
| | D) | None of the choices are correct |
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