Z3d152 Volume 2
UREs from Z3D152 Volume 2 Edit Code 2
- 1.
At what Open System Interconnect (OSI) layer are virtual circuits established, maintained, and terminated?
- A.
Network
- B.
Physical
- C.
Data Link
- D.
Transport
Correct Answer
D. Transport -
- 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.
G.711
Correct Answer
A. Motion Picture Experts Group-4 (MPEG-4) -
- 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.
Layer above.
- B.
Layer below.
- C.
Lowest layer.
- D.
Peer layer.
Correct Answer
C. Lowest layer. -
- 4.
What data communication protocol uses characters or "handshaking" to control the link and represent information?
- A.
Asynchronous protocol.
- B.
Binary synchronous protocol.
- C.
Synchronous Data Link Control (SDLC)
- D.
High-Level Data Link Control (HDLC)
Correct Answer
B. Binary synchronous protocol. -
- 5.
In binary synchronous protocol, which characters establish and maintain character synchronization prior to the message block and during transmission?
- A.
SEQ
- B.
SYN
- C.
STX
- D.
EST
Correct Answer
B. SYN -
- 6.
Which data communication protocol is based on bits and the position of the bits?
- A.
Character-oriented
- B.
Bit-oriented
- C.
Network
- D.
Routing
Correct Answer
B. Bit-oriented -
- 7.
Which data communication protocol is a transmission code that supports a variety of link types and topologies?
- A.
Asynchronous protocol
- B.
Binary synchronous protocol
- C.
Synchronous Data Link Control (SDLC)
- D.
High-Level Data Link Control (HDLC)
Correct Answer
C. Synchronous Data Link Control (SDLC) -
- 8.
Which network layer protocol matches a known Internet Protocol (IP) address for a destination device to a Media Access Control (MAC) address?
- A.
IP
- B.
Address Resolution Protocol (ARP)
- C.
Reverse Address Resolution Protocol (RARP)
- D.
Internet Control Message Protocol (ICMP)
Correct Answer
B. Address Resolution Protocol (ARP) -
- 9.
Which network layer protocol provides messaging that can help with troubleshooting?
- A.
Internet Protocol (IP)
- B.
Address Resolution Protocol (ARP)
- C.
Reverse Address Resolution Protocol (RARP)
- D.
Internet Control Message Protocol (ICMP)
Correct Answer
D. Internet Control Message Protocol (ICMP) -
- 10.
Which transport layer protocol provides reliable data delivery services?
- A.
Internet Protocol (IP)
- B.
User Datagram Protocol (UDP)
- C.
Transmission Control Protocol (TCP)
- D.
Internet Control Message Protocol (ICMP)
Correct Answer
C. Transmission Control Protocol (TCP) -
- 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 Groper (PING)
Correct Answer
C. Network Time Protocol (NTP) -
- 12.
Which network Class has the most addresses for hosts?
- A.
A
- B.
B
- C.
C
- D.
D
Correct Answer
A. A -
- 13.
How many subnet bits are required to support 90 subnets on a Class B network?
- A.
Three
- B.
Five
- C.
Seven
- D.
Nine
Correct Answer
C. Seven -
- 14.
Internet Protocol version 6 (IPv6) addresses are represented by...
- A.
8 groups of dotted decimal numbers.
- B.
8 groups of hexadecimal numbers.
- C.
4 dotted decimal numbers.
- D.
128 decimal numbers.
Correct Answer
B. 8 groups of hexadecimal numbers. -
- 15.
Teredo has four tunneling components. Which one is not one of them?
- A.
Host-specific relay
- B.
Client
- C.
Server
- D.
Agent
Correct Answer
D. Agent -
- 16.
Which device has multiport connectivity that directs data between nodes on a network?
- A.
Bridge
- B.
Router
- C.
Gateway
- D.
Repeater
Correct Answer
B. Router -
- 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)
Correct Answer
A. Border Gateway Protocol (BGP) -
- 18.
Which router port is used for initial configuration?
- A.
Auxiliary
- B.
Console
- C.
Ethernet
- D.
Telnet
Correct Answer
B. Console -
- 19.
When configuring a router, you control access to privileged EXEC mode by configuring which password?
- A.
Line console
- B.
Line vty
- C.
Enable
- D.
Secret
Correct Answer
C. Enable -
- 20.
On a router's serial interface connection, what provides the timing signal for the communication link?
- A.
Data communications equipment
- B.
Data terminal equipment
- C.
Internal oscillator
- D.
Atomic clock
Correct Answer
A. Data communications equipment -
- 21.
Virtual Private Networks (VPNs) allow the AF to extend network resources acrss a/an...
- A.
Department of Defense network
- B.
Air Force network
- C.
Local area network
- D.
Public network
Correct Answer
D. Public network -
- 22.
Which topology defines the way in which devices communicate and data is transmitted throughout the network?
- A.
Physical
- B.
Logical
- C.
Hybrid
- D.
Star
Correct Answer
B. Logical -
- 23.
Which topology has the stations connected in the form of a circle?
- A.
Bus
- B.
Ring
- C.
Star
- D.
Hybrid
Correct Answer
B. Ring -
- 24.
Which topology combines two or more different physical topologies in a single network?
- A.
Bus
- B.
Ring
- C.
Star
- D.
Hybrid
Correct Answer
D. Hybrid -
- 25.
Which device subdivides a network into smaller logical pieces, or segments?
- A.
Switch
- B.
Firewall
- C.
Gateway
- D.
Repeater
Correct Answer
A. Switch -
- 26.
The time it takes a switch to figure out where to forward a data unit is called its...
- A.
Lag.
- B.
Hop.
- C.
Latency.
- D.
Time zone.
Correct Answer
C. Latency. -
- 27.
Which of the following is not a distinct layer of hierarchical network design?
- A.
Core
- B.
Access
- C.
Transport
- D.
Distribution
Correct Answer
C. Transport -
- 28.
How many broadcast domains forms a Virtual LAN (VLAN)?
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
A. 1 -
- 29.
What allows transportation of all active Virtual LANs (VLAN) between switches using a single physical link?
- A.
VLAN trunks
- B.
VLAN frames
- C.
VLAN links
- D.
VLAN ports
Correct Answer
A. VLAN trunks -
- 30.
Which of the following will minimize EtherChannel configuration problems?
- A.
Disable all the interfaces after creating the EtherChannel
- B.
Configure all interfaces to operate at the same speed and duplex mode
- C.
Configure all interfaces for the same parameters as the last port configured
- D.
Assign all interfaces in the EtherChannel to a different Virtual LAN (VLAN)
Correct Answer
B. Configure all interfaces to operate at the same speed and duplex mode -
- 31.
Which Institute of Electrical Electronics Engineers (IEEE) specification is least susceptible to interference caused by household appliances and medical devices?
- A.
802.11a
- B.
802.11b
- C.
802.11g
- D.
802.11r
Correct Answer
A. 802.11a -
- 32.
Which wireless design phase accounts for the amount of users on the network, the training required for the users and the security and integrity requirements of the network data?
- A.
Planning
- B.
Securing
- C.
Deployment
- D.
Management
Correct Answer
A. Planning -
- 33.
What identifier differentiates one wireless local area network (WLAN) from another?
- A.
Hostname
- B.
Network name
- C.
Service Set Identifier (SSID)
- D.
Virtual LAN Identifier (VLAN ID)
Correct Answer
C. Service Set Identifier (SSID) -
- 34.
A Management Information Base (MIB) is a collection of information that is organized...
- A.
Alphabetically
- B.
Hierarchically
- C.
Numerically
- D.
Objectively
Correct Answer
B. Hierarchically -
- 35.
Simple Network Management Protocol (SNMP) is a tool used by network administrators to manage network performance, investigate and solve network problems and help plan for...
- A.
Future growth.
- B.
Network security.
- C.
Remote monitoring.
- D.
Network contingencies.
Correct Answer
A. Future growth. -
- 36.
Which physical security action can you take to ensure network equipment supports the widest range of security services?
- A.
Configure the equipment with the maximum amount of memory possible
- B.
Configure the equipment to use a line console password
- C.
Power cycle the equipment at the end of the day
- D.
Configure the equipment using setup mode
Correct Answer
A. Configure the equipment with the maximum amount of memory possible -
- 37.
In general, you should deny direct dial-in access to a network device by disabling which port?
- A.
Console
- B.
Auxiliary
- C.
Interface
- D.
Virtual terminal
Correct Answer
B. Auxiliary -
- 38.
Individual pulses within a digital signal are...
- A.
Bits.
- B.
Bytes.
- C.
Codes.
- D.
Blocks.
Correct Answer
A. Bits. -
- 39.
What is most commonly used in data systems to express signaling speed?
- A.
Baud rate
- B.
Interface speed
- C.
Bits per second
- D.
Baud per second
Correct Answer
C. Bits per second -
- 40.
Which option is a characteristic of synchronous data operation?
- A.
Timing pulses are transmitted within the signal stream
- B.
Start and stop pulses control data transmission
- C.
System timing is not of critical importance
- D.
All data bits are the same length in time
Correct Answer
D. All data bits are the same length in time -
- 41.
A digital signal that contains synchronizing bits within the signal stream describes...
- A.
Synchronous operation.
- B.
Asynchronous operation.
- C.
Synchronous and/or isochronous operation
- D.
Asynchronous and/or synchronous operation
Correct Answer
B. Asynchronous operation. -
- 42.
How many voltage levels does a binary signal have?
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
B. 2 -
- 43.
In what type of digital signal does the signal level move to one of the discrete signal levels, but returns to the zero level after a predetermined time?
- A.
Non-return-to-zero (NRZ) level
- B.
NRZ mark
- C.
NRZ space
- D.
Return-to-zero
Correct Answer
D. Return-to-zero -
- 44.
Digital coding techniques such as binary with eight-zero substitution (B8ZS) are becoming more popular because they are designed to...
- A.
Provide error-free signaling.
- B.
Operate at higher data rates.
- C.
Eliminate bipolar violations.
- D.
Maintain ones density standards.
Correct Answer
D. Maintain ones density standards. -
- 45.
Which statement best describes a binary with eight-zero substitution (B8ZS) signal?
- A.
The information is transmitted in three different voltage levels.
- B.
A logic one is transmitted as positive voltage if the previous logic one was negative.
- C.
The level always returns to zero for 50 percent of the bit cycle after every transition.
- D.
Bipolar violations are intentionally inserted into a data signal to break up long strings of zeros.
Correct Answer
D. Bipolar violations are intentionally inserted into a data signal to break up long strings of zeros. -
- 46.
How many framing bits are in the extended superframe format (ESF) framing sequence?
- A.
8
- B.
12
- C.
24
- D.
48
Correct Answer
C. 24 -
- 47.
The signaling equipment has three types of communications signals that function to...
- A.
Process witch addressing.
- B.
Control digit translations.
- C.
Control and process calls.
- D.
Provide a clear signal.
Correct Answer
C. Control and process calls. -
- 48.
Which communications control signal uses a two-frequency dialing combination?
- A.
Pulse
- B.
Tone
- C.
Digit
- D.
Address
Correct Answer
B. Tone -
- 49.
In common associated signaling (CAS), what is the seventh bit in frames 6 and 12 used for?
- A.
Bit robbing
- B.
Bit stuffing
- C.
Frame correction
- D.
Frame enhancement
Correct Answer
A. Bit robbing -
- 50.
How is supervisory signaling information transferred in common channel signaling (CCS)?
- A.
Bit robbing
- B.
Bit stuffing
- C.
Frame correction
- D.
Separate network channel
Correct Answer
D. Separate network channel -
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Current Version
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Aug 07, 2017Quiz Edited by
ProProfs Editorial Team -
Jul 20, 2017Quiz Created by
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