1. Which layer of the OSI model defines how to start, control, and end conversations by grouping messages in a workflow?

A)Application layer

B)Presentation layer

C)Session layer

D)Transport layer

E)Network layer

F)Data link layer

G)Physical layer

2. Which of the following terms best describes the process of adding headers and possibly trailers to information for transit?

A)Frames B) Encapsulation C) Packets D) Data Linking

3.Which of the OSI model layers has the main purpose of defining and negotiating data formatting?

A)Data link

B)Application

C)Transport

D)Presentation

E)Network

4.In IT, what term refers to a small network that is used for business purposes, typically in the home of a business or employee?

A)Enterprise network

B)IT network

C)Cloud network

D)SOHO network

E)Organizational network

5.Which layer of the TCP/IP model defines the rules for data packet recovery?

A)Application B) Transport C) Internet D) Data link

6.An Ethernet address is also commonly referred to as a address.

A)Unicast B) MAC C) Host D) IP E)Cam

7.On a LAN RJ-45 connector, what name is given to the eight physical connections that make contact when connected?

A)Threads B) Strands C) Crimps D) Wires E) Pins

8.Which IEEE standard defines the use of radio waves to communicate between wireless LAN nodes?

A)IEEE 802.11

B)IEEE 802.16

C)IEEE 802.3

D)IEEE 802.2

E)IEEE 802.5

9.When a collision occurs on a shared Ethernet network, what is the first step in recovery for the two computers in question?

A)Send a jamming signal. B) Wait for the other computer to finish.

C) Do nothing until the line clears. D) Resend the last frame right away.

10.When connecting a wire to a host FastEthernet interface, which pins are used for communications?

A)Pins 3 and 6 to receive B) Pins 1 and 2 for receive

C) Pins 1 and 2 to receive D) Pins 3 and 6 to transmit

E) Pins 1 and 2 to transmit F) Pins 7 and 8 for transmit

11.When connecting a router to an external CSU/DSU, which serial cable type is typically used?

A)RTS B) DTE C) DCE D) CTS E) DE

12.What is the name of the device that is typically located within a telephone company's central office (CO) and enables it to utilize existing telephone wiring for both normal telephone services and DSL?

A)CMTS

B)DSLAM

C)DSL modem

D)Class 5 switch

E)Telephone concentrator

13.Which HDLC field is equivalent to the preamble in Ethernet?

A)Address B) FCS C) Flag D) Control

14.Which of the following is the correct term describing the middle of the Internet, owned by various Internet service providers and consisting of a complex network of networks?

A)WAN B) Internet access link

C) Internet core D) LAN

15.Which of the following fields in HDLC does not exist in Ethernet and is typically considered outmoded for modern links between routers?

A)Address B) Flag C) FCS D) Control

16)What command can be used on most modern PC operating systems to display the contents of the ARP cache from the CLI?

A)ifconfig B) netstat -a C) arpname D) arp -a

17.Which layer of the TCP/IP network model specifies how packets travel end to end over a TCP/IP network?

A)Transport B) Session C) Application D) Network

18.An IP address consists of a 32-bit binary number. When written like this: 192.168.1.1, it is known as notation.

A)Dotted-decimal B) Decimal

C) Base 10 D) Octet

19. defines a method of further subdividing the IPv4 address space into groups that are smaller than a single IP (classful) network.

A)Supernetting

B)Subclassification

C)Summarization

D)Extrapolation

E)Subnetting

20.Which protocol does a router use to obtain the MAC address of a PC host located on a directly connected subnet?

A)IP B) DNS C) DHCP D) ARP