Network + : Questions Missed Ch1-ch5
Questions missed from Chapter 1 to Chapter 5.
- 1.
You are connected to a server on the Internet and you click on a link on the server and receive a time-out message. What layer could be the cause of this message?
- A.
Application
- B.
Transport
- C.
Network
- D.
Physical
Correct Answer
A. ApplicationExplanation
If the remote server is busy or does not respond to your web browser request, this is an Application layer problem.Rate this question:
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- 2.
When data is encapsulated, which is the correct order?
- A.
Data, frame, packet, segment, bits
- B.
Segment, data, packet, frame, bits
- C.
Data, segment, packet, frame, bits
- D.
Data, segment, frame, packet, bits
Correct Answer
C. Data, segment, packet, frame, bitsExplanation
The encapsulation order is data, segment, frame, packet, bitsRate this question:
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- 3.
What are two purposes for segmentation with a bridge?
- A.
To add more broadcast domains
- B.
To create more collision domains
- C.
To add more bandwidth for users
- D.
To allow more broadcasts for users
Correct Answer(s)
B. To create more collision domains
C. To add more bandwidth for usersExplanation
Bridges and switches break up collision domains, which allow more bandwidth for users.Rate this question:
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- 4.
Which of the following are types of flow control? (Choose all that apply.)
- A.
Buffering
- B.
Cut-through
- C.
Windowing
- D.
Congestion avoidance
- E.
VLANs
Correct Answer(s)
A. Buffering
C. Windowing
D. Congestion avoidanceExplanation
The common types of flow control are buffering, windowing, and congestion avoidance.Rate this question:
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- 5.
What is the purpose of flow control?
- A.
To ensure that data is retransmitted if an acknowledgement is not received
- B.
To reassemble segments in the correct order at the destination device.
- C.
To proved a means for the receiver to govern the amount f data sent by the sender.
- D.
To regulate the size of each segment.
Correct Answer
C. To proved a means for the receiver to govern the amount f data sent by the sender.Explanation
Flow control allows the receiving device to control the pace of the transmitting device so the receiving device's buffer does not overflow.Rate this question:
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- 6.
Which IEEE standard specifies the protocol for CSMA/CD?
- A.
802.2
- B.
802.3
- C.
802.5
- D.
802.11
Correct Answer
B. 802.3Explanation
The 802.3 standard, commonly associated with Ethernet, specifies the media-access method used by Ethernet, which is known as Carrier Sense Multiple Access with Collision Detection. (CSMA/CD).Rate this question:
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- 7.
Which of the following Ethernet unshielded twisted-pair (UTP) cables types is most commonly used?
- A.
10Base-T
- B.
100Base-TX
- C.
1000Base-TX
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
UTP is commonly used in twisted-pair Ethernet like 10Base-T, 100Base-TX, 1000Base-TX, and so on.Rate this question:
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- 8.
Fiber-optic cable is immune to electromagnetic interference (EMI) and radio frequency interference (RFI) because it:
- A.
Transmits analog signals using electricity
- B.
Transmits analog signals using light impulses
- C.
Transmits digital signals using light impulses
- D.
Transmits digital signals using electricity
Correct Answer
C. Transmits digital signals using light impulsesExplanation
Transmits digital signals using light impulsesRate this question:
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- 9.
How many hosts on a half-duplex segment can talk at one time?
- A.
0
- B.
1
- C.
2
- D.
4
Correct Answer
B. 1Explanation
In half-duplex communication, a device can either send communication or receive communication, but it cannot do both at the same time.Rate this question:
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- 10.
Which type of cable should be used to connect to the console port on a router?
- A.
Console cable
- B.
Crossover cable
- C.
Straight-through cable
- D.
USB
Correct Answer
A. Console cableExplanation
A rolled cable or console cable would be used to connect a host to a router console serial communication (com) portRate this question:
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- 11.
You need to make a 586B cable. How many pairs will you use?
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
B. 2Explanation
A 586B is a crossover cable and this cable uses two pairs of wires.Rate this question:
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- 12.
On an Ethernet switched network what address does one host computer use to communicate with another?
- A.
IP address
- B.
MAC address
- C.
Street address
- D.
HUB address
Correct Answer
B. MAC addressExplanation
On an Ethernet Network, the MAC address (hardware address) is used for one host to communicate with another.Rate this question:
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- 13.
What is the maximum distance of 10GBase-SR?
- A.
100 meters (328 feet)
- B.
302 meters (990 feet)
- C.
305 meters (1000 feet)
- D.
1593 km (6 miles)
Correct Answer
B. 302 meters (990 feet)Explanation
A 10GBase-SR cable can have a maximum distance of 990 feet (302 meters)Rate this question:
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- 14.
What is the maximum distance of 100GBase-LR?
- A.
1 mile
- B.
3 miles
- C.
6 miles
- D.
25 miles
Correct Answer
C. 6 milesExplanation
A 10GBase-LR implementation can go a distance of up to 6 miles.Rate this question:
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- 15.
What is the decimal value for the binary number 11101000?
- A.
9
- B.
A
- C.
C
- D.
B
Correct Answer
B. AExplanation
Please review conversion chart!Rate this question:
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- 16.
How many bits is a MAC address?
- A.
16
- B.
32
- C.
48
- D.
64
Correct Answer
C. 48Explanation
A MAC, or hardware, address is a 48-bit (6-byte) address written in hexadecimal format.Rate this question:
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- 17.
What is the purpose of the Frame Check Sequence (FCS) in an Ethernet frame?
- A.
Error correction
- B.
Error detection
- C.
Error recovery
- D.
Creating errors
Correct Answer
B. Error detectionExplanation
The FCS can detect frames in the sequence by calculating the cyclic redundancy check (CRC), which verifies that all the bits in the frame are unchanged.Rate this question:
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- 18.
Which is not a common term asociated with modems?
- A.
POTS
- B.
DSL
- C.
Cable
- D.
NIC
Correct Answer
D. NICExplanation
A modem is a device that modulates digital data onto an analog carrier for transmission over an analog medium and then demodulates from the analog carrier to a digital signal again at the receiving end. Therefore, traditional (POTS), DSL, and cable are all common types of modems. The NIC is the expansion card you install in your computer to connect, or interface, your computer to the network.Rate this question:
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- 19.
Which of the following devices can work at both Layers 2 and 3 of the OSI model?
- A.
Hub
- B.
Switch
- C.
Repeater
- D.
Bridge
Correct Answer
B. SwitchExplanation
A switch is typically just a Layer 2 device segmenting the network by using MAC addresses. However, some higher-end switches can provide Layer 3 services.Rate this question:
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- 20.
Which device should be used if you need to send incoming packets to one or more machines that are hidden behind a single IP address?
- A.
Switch
- B.
Load balancer
- C.
Hub
- D.
Repeater
Correct Answer
B. Load balancerExplanation
A load balancer uses a little trickery and sends incoming packets to one or more machines that are hidden behind a single IP address. Modern load-balancing routers can use different rules to make decisions about where to route traffic, which can be based on least load, fastest response times, ore simply balancing requests.Rate this question:
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- 21.
What role does that "A" record in a Domain Name Service (DNS) server have in your network?
- A.
Translates human name to IP address
- B.
Translate IP address to human name
- C.
Enables printing, copying, and faxing from one device
- D.
Controls network packets to optimize performance
Correct Answer
A. Translates human name to IP addressExplanation
DNS translates human names to IP addresses for routing your packet through the Internet. Hosts can receive the IP address of this DNS server and then resolve host names to IP addresses.Rate this question:
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- 22.
Users on your network are saturation your bandwidth because they are using too many non-work related sites. What device would limit the availability of the types of sites that users on a LAN have access to while providing granular control over the traffic between local LAN and the Internet?
- A.
Switch
- B.
DHCP server
- C.
DNS server
- D.
Proxy server
Correct Answer
D. Proxy serverExplanation
A proxy sever can provide many functions. A proxy server can use a caching engine so repeated access request for web information would accelerate repeated access for users, and they can also limit the availability of websites.Rate this question:
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Mar 20, 2022Quiz Edited by
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May 16, 2010Quiz Created by
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