Which of the following cable types is most susceptible to electromagnetic interference?

Which of the following cable types is most susceptible to electromagnetic interference?

• Fiber optic
• STP
• Coaxial
• UTP 

EXPLANATION

UTP cable is susceptible to EMI.
Incorrect Answers:
B: RG-8 coaxial cable is also susceptible to EMI, but not to the same extent as UTP.
C: Fiber optic cable is immune to EMI.References:David Groth and Dan Newland, A+ Complete
Study Guide (2nd Edition), Sybex, Alameda CA, 2002, pp. 325,327.David Groth and Toby
Skandier, Network+ Study Guide (4th Edition), Sybex, Alameda CA, 2005, pp. 19-20, 25-27.
D: Fiber optic cable is immune to EMI.References:David Groth and Dan Newland, A+ Complete
Study Guide (2nd Edition), Sybex, Alameda CA, 2002, pp. 325,327.David Groth and Toby
Skandier, Network+ Study Guide (4th Edition), Sybex, Alameda CA, 2005, pp. 19-20, 25-27.

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What type of cable would you use to establish a connection between a PC and a switch?

What type of cable would you use to establish a connection between a PC and a switch?

• Passover
• Straight-through
• Rollover
• Crossover 

EXPLANATION

 

Straight Through vs Crossover Cable, which to choose?
Straight through vs crossover cable, which one should I choose? Usually, straight through cables are primarily used for connecting unlike devices. And crossover cables are use for connecting alike devices.
Use straight through Ethernet cable for the following cabling:

• Switch to router
• Switch to PC or server
• Hub to PC or server

Use crossover cables for the following cabling:

• Switch to switch
• Switch to hub
• Hub to hub
• Router to router
• Router Ethernet port to PC NIC
• PC to PC

 

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What type of cable would you use for a PC to console connection?

What type of cable would you use for a PC to console connection?

• Crossover
• Rollover
• RedRover
• Straight-through 

 

 

EXPLANATION

 

Rollover cable (also known as a Yost cable or a Console cable) is a type of null-modem cable that is often used to connect a computer terminal to a router's console port. This cable is typically flat (and has a light blue color) to help distinguish it from other types of network cabling.

Rollover cable (also known as Cisco console cable) is a type of cable that is most commonly used to connect a computer terminal to a router's console port. So it is said tht when u connect Pc to a console port of router -> Cross over cable is used. It same in the case of rollover cable which is used to connect Pc to a console port of router..

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What type of cable would you use to connect one PC to another PC?

What type of cable would you use to connect one PC to another PC?

• Crossover
• Rollover
• Ribbon
• Straight-through 

EXPLANATION

 

Choose a Straight-Through or Crossover Cable?

Usually, straight-through cables are primarily used for connecting unlike devices. And crossover cables are use for connecting unlike devices alike devices.
Use straight-through cable for the following cabling:

• Switch to router
• Switch to PC or server
• Hub to PC or server

Use crossover cables for the following cabling:

• Switch to switch
• Switch to hub
• Hub to hub
• Router to router
• Router Ethernet port to PC NIC
• PC to PC

 

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Which of these supports speeds of up to 100 Mbps?

Which of these supports speeds of up to 100 Mbps?

• Cat 5
• Cat 2
• Cat 4
• Cat 3 

 

 

EXPLANATION

 

CAT3

The Category 3 or CAT3 standard was used heavily in the early 90’s for wiring offices and homes. It’s still used in two-line phone configurations, but has largely fallen out of favor for wired networking thanks to the Category 5e cable’s superior performance. CAT3 can be relied on to handle data speeds of up to 10 Mbps, but no more. Its maximum frequency clocks in at 16 MHz. Like many other cabling options, it relies on copper for data and power transmission. While theoretically limited to 10BASE-T Ethernet, it can actually support 100BASE-T4 speeds by using 4 wires instead of 2 to achieve 100 Mbps throughput.

CAT5

Around 2000 or so, CAT5 overtook CAT3 as the Ethernet cable of choice for LAN networking. CAT5 uses either the 10BASE-T or 100BASE-T standard for data transmission. Using two cable pairs to signal over copper wire, CAT5 is now largely archaic and isn’t widely used for Ethernet connections. It’s rated for a maximum frequency of 100 MHz and top speeds of 100 Mbps. CAT5 uses 8P8C modular connectors to connect devices together, and can be used effectively at lengths of up to 100 meters. Today, CAT5 cable has been replaced for the most part by CAT5e. 

CAT5e

While very similar to CAT5 in appearance, CAT5e introduces some new wrinkles in the equation. For one thing, CAT5e uses four pairs of copper wire rather than the two that CAT5 relies on. In addition, the wire pairs are twisted more tightly and are sheathed in heavy-duty shielding to eliminate crosstalk. Crosstalk cuts down on the speed at which a cable can transmit information. Thanks to its internal upgrades, CAT5e is capable of achieving 1000BASE-T speeds. In other words, it can handle up to 1 Gbps of throughput at a distance of up to 100 meters. As of today, it’s the most common type of cabling found in modern homes and offices for Ethernet purposes. 

 

 

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Which type of fiber-optic cable transmits multiple streams of LED-generated light?

Which type of fiber-optic cable transmits multiple streams of LED-generated light?

• Multi-phase
• Multi-channel
• Multi-color
• Multi-mode 

EXPLANATION

 

 

 Multi-mode optical fiber is a type of optical fiber mostly used for communication over short distances, such as within a building or on a campus. Typical multi-mode links have data rates of 10 Mbit/s to 10 Gbit/s over link lengths of up to 600 meters (2000 feet).

Fiber optic cabling and hardware products including single mode and multimode fiber patch cables of 62.5/125, 50/125, and 9/125, and fiber distribution products used in high tech networking.

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In an optical fiber, the inner core is _______ the cladding.

In an optical fiber, the inner core is _______ the cladding.

• the same density as
• also known as
• less dense than
• denser than 

EXPLANATION

 

An optical fiber has two layers, the inner layer and the outer layer. The inner layer is called core. The data pass through a core. This core is made of dense of glass or plastic. The outer layer of a fiber is called cladding. It is also made of glass or plastic. Its glass or plastic is less dense.
Cladding is used in optical fiber for prevent any refraction while passing data. The function of cladding is to occur full internal reflection in optical fiber. That is why a cladding’s density is lower then core.

The inner core of an optical fiber is Glass or plastic

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