1.
At what Open System Interconnection (OSI) layer are virtual circuits established, maintained and terminated?
A. 
B. 
C. 
D. 
2.
Which of the following is an example of a video compression standard?
A. 
Motion Picture Experts Group-4 (MPEG-4)
B. 
Joint Photographic Experts Group (JPEG).
C. 
File Transfer Protocol (FTP)
D. 
3.
In the Open System Interconnect (OSI) model, a layer will communicate with three other OSI layers. Which one is not one of those layers?
A. 
B. 
C. 
D. 
4.
What data communication protocol uses characters or "handshaking" to control the link and represent information?
A. 
B. 
Binary synchronous protocol
C. 
Synchronous Data Link Control (SDLC)
D. 
High-Level Data Link Control
5.
In binary-synchronous protocol, which characters establishes and maintains character synchronization prior to the message block and during transmission?
A. 
B. 
C. 
D. 
6.
Which data communication protocol is based on bits and the position of the bits?
A. 
B. 
C. 
D. 
7.
Which data communication protocol is a transmission code that supports a variety of link types and topologies?
A. 
B. 
Binary Synchronous Protocol
C. 
Synchronous Data Link Control (SDLC)
D. 
High-Level Data Link Control (HDLC)
8.
Which network layer protocol matches a known Internet protocol (IP) address for a destination device to a Media Access Control (MAC) address?
A. 
B. 
Address Resolution Protocol (ARP)
C. 
Reverse Address Resolution Protocol (RARP)
D. 
Internet Control Message Protocol (ICMP)
9.
Which Network layer protocol provides messaging that can help with troubleshooting?
A. 
B. 
Address Resolution Protocol (ARP)
C. 
Reverse Address Resolution Protocol (RARP)
D. 
Internet Control Message Protocol (ICMP)
10.
Which Transport layer protocol provides reliable data delivery services?
A. 
B. 
User Datagram Protocol (UDP)
C. 
Transmission Control Protocol (TCP)
D. 
Internet Control Message Protocol (ICMP)
11.
Which Application layer protocol is used to synchronize the clocks of computers on a network?
A. 
Simple Network Management Protocol (SNMP).
B. 
Dynamic Host Configuration Protocol (DHCP)
C. 
Network Time Protocol (NTP)
D. 
Packet Internet Grouper (PING)
12.
Which network Class has the most addresses for hosts?
A. 
B. 
C. 
D. 
13.
How many subnet bits are required to support 90 subnets on a Class B network?
A. 
B. 
C. 
D. 
14.
Internet protocol version 6 (IPv6) addresses are represented by
A. 
8 groups of dotted decimal numbers
B. 
8 groups of hexadecimal numbers
C. 
D. 
15.
Teredo has four tunneling components. Which one is not one of them?
A. 
B. 
C. 
D. 
16.
Which device has multiport connectivity that directs data between nodes on a network?
A. 
B. 
C. 
D. 
17.
Which routing protocol do internet backbones use?
A. 
Border Gateway Protocol (BGP).
B. 
Open Shortest Path First (OSPF).
C. 
Routing Information Protocol (RIP).
D. 
Enhanced Interior Gateway Routing Protocol (EIGRP).
18.
Which router port is used for initial configuration?
A. 
B. 
C. 
D. 
19.
When configuring a router, you control access to privileged EXEC mode by configuring which password?
A. 
B. 
C. 
D. 
20.
On a router’s serial interface connection, what provides the timing signal for the communication link?
A. 
Data communications equipment
B. 
C. 
D. 
21.
Virtual Private Networks (VPNs) allow the AF to extend network resources across a/an
A. 
Department of Defense Network
B. 
C. 
D. 
22.
Which topology defines the way in which devices communicate and data is transmitted throughout the network?
A. 
B. 
C. 
D. 
23.
Which topology has the stations connected in the form of a circle?
A. 
B. 
C. 
D. 
24.
Which topology combines two or more different physical topologies in a single network?
A. 
B. 
C. 
D. 
25.
Which device subdivides a network into smaller logical pieces, or segments?
A. 
B. 
C. 
D.