Internetworking - Internetworking

What type of RJ45 UTP cable is used between switches?

A.	Straight-through
B.	Crossover cable
C.	Crossover with a CSU/DSU
D.	Crossover with a router in between the two switches

Answer: Option B

Explanation:

To connect two switches together, you would use a RJ45 UTP crossover cable.

Which of the following are unique characteristics of half-duplex Ethernet when compared to full-duplex Ethernet?

Half-duplex Ethernet operates in a shared collision domain.
Half-duplex Ethernet operates in a private collision domain.
Half-duplex Ethernet has higher effective throughput.
Half-duplex Ethernet has lower effective throughput.

A.	2 only
B.	1,2 and 3
C.	1 and 4
D.	4 only

Answer: Option C

Explanation:

Unlike full duplex, half-duplex Ethernet operates in a shared collision domain, and it has a lower effective throughput than full duplex.

When data is encapsulated, which is the correct order?

A.	Data, frame, packet, segment, bit
B.	Segment, data, packet, frame, bit
C.	Data, segment, packet, frame, bit
D.	Data, segment, frame, packet, bit

Answer: Option C

Explanation:

The encapsulation method is data, segment, packet, frame, bit.

Segmentation of a data stream happens at which layer of the OSI model?

A.	Physical
B.	Data Link
C.	Network
D.	Transport

Answer: Option D

Explanation:

The Transport layer receives large data streams from the upper layers and breaks these up into smaller pieces called segments.

How 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: Option D

Explanation:

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

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: Option D

Explanation:

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

Which fields are contained within an IEEE Ethernet frame header?

Source and destination MAC address
Source and destination network address
Source and destination MAC address and source and destination network address
FCS field

A.	1 and 4
B.	2 only
C.	2 and 3 only
D.	3 only

Answer: Option A

Explanation:

An Ethernet frame has source and destination MAC addresses, an Ether-Type field to identify the Network layer protocol, the data, and the FCS field that holds the answer to the CRC.

Acknowledgments, sequencing, and flow control are characteristics of which OSI layer?

A.	Layer 2
B.	Layer 3
C.	Layer 4
D.	Layer 7

Answer: Option C

Explanation:

A reliable Transport layer connection uses acknowledgments to make sure all data is transmitted and received reliably. A reliable connection is defined by a virtual circuit that uses acknowledgments, sequencing, and flow control, which are characteristics of the Transport layer (layer 4).

Internetworking - Internetworking

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