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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:

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:

What type of RJ45 UTP cable do you use to connect a PC's COM port to a router or switch console port?

A) Straight - through B) Crossover cable
C) Crossover with a CSU/DSU D) Rolled
 
Answer & Explanation Answer: D) Rolled

Explanation:

To connect to a router or switch console port, you would use an RJ45 UTP rolled cable.

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Q:

Differentiate a MAC address and an IP address and describe how and when each address type is used in a network?

Answer

A MAC address is a hexadecimal number identifying the physical connection of a host. MAC addresses are said to operate on layer 2 of the OSI model. IP addresses, which can be expressed in binary or decimal format, are logical identifiers that are said to be on layer 3 of the OSI model. Hosts on the same physical segment locate one another with MAC addresses, while IP addresses are used when they reside on different LAN segments or subnets. Even when the hosts are in different subnets , a destination IP address will be converted to a MAC address when the packet reaches the destination network via routing.

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Q:

What is the bit length and expression form of a MAC address?

Answer

48 bits (6 bytes) expressed as a hexadecimal number.

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