Network Security 2

Question 1

*** router analyzes data packets before forwarding, a bridge forwards data w/o analysis

*** repeater = amplifies and strengthens a signal

*** data link : modem, switch, bridge // network : switch, router // physical : modem, hub, repeater

Answer 1

router etc …

Question 2

supports up to 10 Mbps (Megabits per second) for up to 100 meters and is commonly used for phone lines today.

Answer 2

Cat 3 Cabling

Question 3

supports 16 Mbps for up to 100 meters and is not commonly used today.

Answer 3

Cat4 Cabling

Question 4

is used in Ethernet LANs containing two twisted pairs allowing for up to 100 Mbps up to 100 meters between the device and the switch, hub, or router.

Answer 4

Cat5 Cabling

Question 5

doubles the number of twisted pairs to four for up to 1 Gbps (Gigabits per second) over up to 100 meters.

Answer 5

Cat5e Cabling

Question 6

is also used in Ethernet LANs and data centers. Cat_ is made up of four tightly woven twisted pairs (more twists per linear foot) and supports 1 Gbps for up to 100 meters or 10 Gbps for up to 55 meters.

Answer 6

Cat6 Cabling

Question 7

with the ability to run 10 Gbps over 100 meters maximum, but using a higher quality cable that is more resistant to interference. This is most commonly used in wired networks today.

Answer 7

Cat6a

Question 8

RJ11: A connector that supports two pairs of wires (four total); typically used in telephones.

RJ45: This is an end connector typically used with Ethernet cables and supports four pairs (eight wires).

Coaxial cables are analog cables made of copper but specifically engineered with a metal shield intended to block signal interference.

fiber cables : they transfer data digitally but much more expensive

Answer 8

RJ11 etc …

Question 9

are made up of ___ ______ glass or plastic fiber. The benefit of a ______ fiber cable is the ability to carry higher bandwidth for 50 times the distance of a multi-mode cable. This requires higher cost electronics to create the light and thus is typically used for longer distances (hundreds or thousands of kilometers) and higher bandwidth applications.

Answer 9

Single-Mode Cables

Question 10

are wider in diameter due to light modes being sent across the cable. _____mode fibers are highly effective over medium distances (500 meters or less at higher speeds) and are generally used within a LAN. They are also less expensive than single-mode fiber due to the potential for use with LEDs and other lower-cost options for creating the light.

Answer 10

Multi-mode Cables