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Q:

In the operation of CSMA/CD, which host(s) have priority after the expiration of the backoff algorithm?

A) All hosts have equal priority B) The two hosts that caused the collision will have equal priority
C) The host that sent the jam signal after the collision D) The host with the highest MAC address
 
Answer & Explanation Answer: A) All hosts have equal priority

Explanation:

After the expiration of the backoff algorithm , all hosts have equal priority.

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Q:

You have the following binary number :10110111. What are the decimal and hexadecimal equivalents?

A) 69/0x2102 B) 183/B7
C) 173/A6 D) 83/0xC5
 
Answer & Explanation Answer: B) 183/B7

Explanation:

You must be able to take a binary number and convert it into both decimal and hexadecimal. To convert to decimal, just add up the 1s using their values. The values that are turned on with the binary number of 10110111 are 128+32+16+4+2+1=183. To get the hexadecimal equivalent, you need to break the eight binary digits into nibbles (4 bits), 1011 and 0111. By adding up these values, you get 11 and 7. In hexadecimal, 11 is B, so the answer is 0xB7.

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Q:

What is the specific term for the unwanted signal interference from adjacent pairs in the cable?

A) EMI B) RFI
C) Crosstalk D) Attenuation
 
Answer & Explanation Answer: C) Crosstalk

Explanation:

The term for the unwanted signal interference from adjacent pairs in the cable is crosstalk

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Q:

When making a HyperTerminal connection, what must the bit rate be set to?

A) 2400bps B) 1200bps
C) 9600bps D) 6400bps
 
Answer & Explanation Answer: C) 9600bps

Explanation:

When making a HyperTerminal connection, the bit rate must be set to 9600bps.

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Q:

Which of the following is part of the IEEE 802.3u standard?

A) 100Base2 B) 10Base5
C) 100Base-TX D) 1000Base-T
 
Answer & Explanation Answer: C) 100Base-TX

Explanation:

IEEE 802.3u is Fast Ethernet at 100Mbps and covers 100Base-TX, 100BaseT4, and 100Base-FX.

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Q:

You want to implement a network medium that is not susceptible to EMI. Which type of cabling should you use?

A) Thicknet coax B) Thinnet coax
C) Category 5 UTP cable D) Fiber-optic cable
 
Answer & Explanation Answer: D) Fiber-optic cable

Explanation:

Fiber-optic cable provides a more secure, long - distance cable that is not susceptible to EMI interference at high speeds.

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Q:

Which part of a MAC address is called the organizationally unique identifier(OUI)?

A) The first 24 bits, or 3 bytes B) The first 12 bits, or 3 bytes
C) The first 24 bits, or 6 bytes D) The first 32 bits, or 3 bytes
 
Answer & Explanation Answer: A) The first 24 bits, or 3 bytes

Explanation:

The first 24 bits, or 3 bytes, of a MAC address is called the organizationally unique identifier (OUI).

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Q:

Which of the following connection mechanism is used by Ethernet?

A) Token passing B) CSMA/CD
C) CSMA/CA D) Host polling
 
Answer & Explanation Answer: B) CSMA/CD

Explanation:

Ethernet networking uses Carrier Sense Multiple Access with Collision Detection (CSMA/CD), a protocol that helps devices share the bandwidth evenly without having two devices transmit at the same time on the network medium.

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