Chapter 2: Communicating over the network

Which of the following is associated with the network layer? a. IP address b. frames c. MAC address d. physical addressing

A. IP addressing is an OSI Layer 3 function. All others are OSI Layer 2 functions.

Which type of addressing is found at the OSI layer 2? (Choose two) a. logical b. physical c. MAC d. IP e. port

B & C. A MAC address is the physical address burned on the OSI layer 2 network interface card. logical addressing happens at OSI Layer 3.

Which layers of the OSI model are combined into other layers of the TCP/IP model? (Choose all that apply) a. Network b. Presentation c. Internet d. Data link e. Application f. Physical g. Session h. Network access i. Transport

B, D, F & G. The OSI presentation and session layers are combined into eh application layer of the TCP/IP model. The oSI data link and physical layers are combined into the network access layer of TCP/IP. The transport and network layers have parallel layers in TCP/IP.

Which of the following is the process of interweaving multiple data streams onto one shared communication channel or network medium? a. multicasting b. multiplexing c. encapsulation d. multi directing

B. Multiplexing is the correct term

Which one of the following is associated with Layer 4 of the OSI model? a. IP b. TCP c. FTP d. TFTP

B. TCP has control features pertaining to OSI Layer 4, FTP is an application (Layer 7), and IP and TFTP are network layer protocols, (Layer 3).

Which of the following is the correct "top down" order of he OSI model? a. application, presentation, session, network, transport, data link, physical b. Application, presentation, session. transport, network, data link ,physical c. application, session, presentation, transport, network, data link, physical d. application. presentation, session, network, data link, transport, physical

B. The correct order is application, presentation, session, transport, network, data link, physical.

Which of the following are true about LANs and WANs? (Choose two) a. LANs connect groups of network using ISPs b. LANs consist of hosts communicating with logical addresses c. WANs connect groups of networks using TSPs d. WANs connect LANs e. Hosts on a LAN use physical addressing to communicate.

C & E. LANs are connected by WANs. WANs connect networks through telephone service providers (TSP). Logical addressing isn used between networks and physical addressing or MAC addresses are used inside LANs.

Which OSI layer is associated with IP addressing? a. 1 b. 2 c. 3 d. 4

C. IP addresses is a concern of the OSI network layer (Layer 3). Physical addressing happens at OSI layer 2 .

Which of the following terms defines dividing data streams into smaller pieces suitable for transmission? a. protocol b. multiplexing c. segmentation d. encapsulation

C. Segmentation which occurs at OSI Layer 4, is the correct answer.

The elements of communication include a message source, a message destination and a ..............., or medium, to transport the message.

Channel

When a server responds to a web request, what occurs next in the encapsulation process after the web page data is formatted and separated into TCP segments? a. .the client decapsulates the segment and opens the web page b. the client adds the appropriate physical address to the segments so that the serve can forward the data c. the server converts the data to bits for transport across the medium d the server adds the source and destination IP address to each segment header to deliver the packets to the destination e. the server adds the source and destination physical addresses to the packet header

D. Encapsulating into TCP segments occurs at OSI Layer 4, so the next encapsulation is at OSI Layer 3, which includes adding source and destination IP addresses to the segment header San converting them into packets. Then the physical addressing is added and the data is converted to bits.

The device that connects a device to the media is called a/an . ...............

NIC, or network interface card.

A limited - use protocol owned by a company is considered to be ..............

proprietary

A device that moves data between networks is a .........

router

Which term describes a specific set of rules that determine the formattting of messages and the process of encapsulation used to format data? a. segmentation b. protocol c. multiplexing d. QoS e. Reassembly

B. A protocol describes a specific set of rules for communication, including message formatting and encapsulation.

Which layer of the OSI model is concerned with end-to-end message delivery over the network? a. network b. transport c. data link d. application

B. End - to - end message delivery is the concern of OSI Layer 4, the transport layer.