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| 1 | The Internet model consists of _______ layers. |
 | A) | Three |
| B) | Five |
| C) | Seven |
| D) | Eight |
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| 2 | The process-to-process delivery of the entire message is the responsibility of the _______ layer. |
| A) | Network |
| B) | Transport |
| C) | Application |
| D) | Physical |
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| 3 | The _______ layer is the layer closest to the transmission medium. |
| A) | Physical |
| B) | Data link |
| C) | Network |
| D) | Transport |
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| 4 | Mail services are available to network users through the _______ layer. |
| A) | Data link |
| B) | Physical |
| C) | Transport |
| D) | Application |
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| 5 | As the data packet moves from the upper to the lower layers, headers are _______. |
| A) | Added |
| B) | Removed |
| C) | Rearranged |
| D) | Modified |
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| 6 | The _______ layer lies between the network layer and the application layer. |
| A) | Physical |
| B) | Data link |
| C) | Transport |
| D) | None of the above |
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| 7 | Layer 2 lies between the physical layer and the _______ layer. |
| A) | Network |
| B) | Data link |
| C) | Transport |
| D) | None of the above |
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| 8 | When data are transmitted from device A to device B, the header from A's layer 4 is read by B's _______ layer. |
| A) | Physical |
| B) | Transport |
| C) | Application |
| D) | None of the above |
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| 9 | The _______ layer changes bits into electromagnetic signals. |
| A) | Physical |
| B) | Data link |
| C) | Transport |
| D) | None of the above |
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| 10 | Which of the following is an application layer service? |
| A) | Remote log-in |
| B) | File transfer and access |
| C) | Mail service |
| D) | All the above |
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| 11 | 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 above |
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| 12 | 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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| 13 | 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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| 14 | The OSI model consists of _______ layers. |
| A) | three |
| B) | five |
| C) | seven |
| D) | eight |
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| 15 | 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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| 16 | 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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| 17 | 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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| 18 | In the OSI model, encryption and decryption are functions of the ________ layer. |
| A) | transport |
| B) | session |
| C) | presentation |
| D) | application |
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| 19 | 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 above |
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| 20 | To deliver a message to the correct application program running on a host, the _______ address must be consulted. |
| A) | port |
| B) | IP |
| C) | physical |
| D) | none of the above |
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| 21 | IPv6 has _______ -bit addresses. |
| A) | 32 |
| B) | 64 |
| C) | 128 |
| D) | variable |
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| 22 | ICMPv6 includes _______. |
| A) | IGMP |
| B) | ARP |
| C) | RARP |
| D) | a and b |
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| 23 | 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 above |
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| 24 | 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 above |
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| 25 | 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 above |
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| 26 | The Internetworking Protocol (IP) is a ________ protocol. |
| A) | reliable |
| B) | connection-oriented |
| C) | both a and b |
| D) | none of the above |
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| 27 | _______ is a process-to-process protocol that adds only port addresses, checksum error control, and length information to the data from the upper layer. |
| A) | TCP |
| B) | UDP |
| C) | IP |
| D) | none of the above |
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| 28 | __________ provides full transport layer services to applications. |
| A) | TCP |
| B) | UDP |
| C) | ARP |
| D) | none of the above |
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| 29 | 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 above |
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| 30 | 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 above |
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| 31 | A port address in TCP/IP is ______ bits long. |
| A) | 32 |
| B) | 48 |
| C) | 16 |
| D) | none of the above |
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| 32 | The ____ created a model called the Open Systems Interconnection, which allows diverse systems to communicate. |
| A) | OSI |
| B) | ISO |
| C) | IEEE |
| D) | none of the above |
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| 33 | The seven-layer _____ model provides guidelines for the development of universally compatible networking protocols. |
| A) | OSI |
| B) | ISO |
| C) | IEEE |
| D) | none of the above |
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| 34 | The physical, data link, and network layers are the ______ support layers. |
| A) | user |
| B) | network |
| C) | both (a) and (b) |
| D) | neither (a) nor (b) |
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| 35 | The session, presentation, and application layers are the ____ support layers. |
| A) | user |
| B) | network |
| C) | both (a) and (b) |
| D) | neither (a) nor (b) |
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| 36 | The _______ layer links the network support layers and the user support layers. |
| A) | transport |
| B) | network |
| C) | data link |
| D) | session |
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| 37 | The _______ layer coordinates the functions required to transmit a bit stream over a physical medium. |
| A) | transport |
| B) | network |
| C) | data link |
| D) | physical |
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| 38 | The _______ layer is responsible for delivering data units from one station to the next without errors. |
| A) | transport |
| B) | network |
| C) | data link |
| D) | physical |
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| 39 | The ______ layer is responsible for the source-to-destination delivery of a packet across multiple network links. |
| A) | transport |
| B) | network |
| C) | data link |
| D) | physical |
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| 40 | The ________ layer is responsible for the process-to-process delivery of the entire message. |
| A) | transport |
| B) | network |
| C) | data link |
| D) | physical |
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| 41 | The ______ layer establishes, maintains, and synchronizes the interactions between communicating devices. |
| A) | transport |
| B) | network |
| C) | session |
| D) | physical |
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| 42 | The _______ layer ensures interoperability between communicating devices through transformation of data into a mutually agreed upon format. |
| A) | transport |
| B) | network |
| C) | data link |
| D) | presentation |
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| 43 | The _________ layer enables the users to access the network. |
| A) | transport |
| B) | application |
| C) | data link |
| D) | physical |
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| 44 | TCP/IP is a ______ hierarchical protocol suite developed ____ the OSI model. |
| A) | seven-layer; before |
| B) | five-layer; before |
| C) | six-layer; before |
| D) | five-layer; after |
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| 45 | The TCP/IP _______ layer is equivalent to the combined session, presentation, and application layers of the OSI model. |
| A) | application |
| B) | network |
| C) | data link |
| D) | physical |
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| 46 | The ________ address, also known as the link address, is the address of a node as defined by its LAN or WAN. |
| A) | physical |
| B) | IP |
| C) | port |
| D) | specific |
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| 47 | The ____ address uniquely defines a host on the Internet. |
| A) | physical |
| B) | IP |
| C) | port |
| D) | specific |
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| 48 | The_____ address identifies a process on a host. |
| A) | physical |
| B) | IP |
| C) | port |
| D) | specific |