Week 2

Question 1

LAN Standards created by?

Answer 1

IEEE (Institute of Electrical and Electronics Engineers)

Question 2

NIC Funtions?

Answer 2

NIC (Network Interface Card):

1. Logical link control (LLC)
   - communicates with upper layers in the computer
2. Naming:
   - provides a unique MAC address identifier
3. Framing:
   - part of the encapsulation process, packaging the bits for transport
4. Media access control (MAC):
   - provides structured access to shared access media
5. Signaling:
   - creates signals and interface with the media

Question 3

Categories of Standard Ethernet?

Answer 3

a. 10Base5 : Bus, thick coaxial
b. 10Base2 : Bus, thin coaxial
c. 10Base-T : Star, UTP
d. 10Base-F : Star, Fiber

Question 4

Bus and Tree characteristics?

Answer 4

1. multipoint medium
2. transmission propagates throughout medium
3. heard by all stations
4. need to regulate transmission:
   - to avoid collisions and hogging

Question 5

Star Topology characteristics?

Answer 5

1. each station connected directly to central node
2. central node can broadcast
3. central node can act as frame switch

Question 6

2 jenis transmission media?

Answer 6

1. Guided (wired) :
   a. Twisted-pair cable
   b. Coaxial cable
   c. Fiber-optic cable
2. Unguided media (wireless) :
   a. Radio wave
   b. Microwave
   c. Infrared

Question 7

Most common type of connector used for Coaxial Cable?

Answer 7

Bayonet Neill-Concelman (BNC) connector

Question 8

Most common twisted-pair cable used in communcation is?

Answer 8

UTP (unshielded twisted-pair)

Question 9

Most common UTP Connector is?

Answer 9

RJ45 (RJ stands for Registered jack)

Question 10

Fiber optic cable connector?

Answer 10

1. subscriber channel (SC) connector digunakan untuk cable TV
2. straight-tip (ST) connector untuk networking devices
3. MT-RJ yang ukurannya sama dengan RJ45.

Question 11

advantages of Optical Fiber?

Answer 11

1. higher bandwith
2. less signal attenuation, signal dapat ditransfer sejauh 50 km tanpa harus regeneration. sedangkan coaxial atau twisted-pair harus menggunakan repeater setiap 5 km.
3. immunity to electromagnetic interference, electromagnetic noise tidak berpengaruh terhadap fiber-optic cable
4. resistance to corrosive materials, bahan lebih kuat
5. light weight
6. greater immunity to tapping

Question 12

disadvantages of Optical Fiber?

Answer 12

1. installation and maintenance
2. unidirectional light propagation, hanya satu arah. kalau mau bidirectional harus ada dua fiber optic cable.
3. cost

Question 13

Propagation modes dalam Optical Fiber?

Answer 13

1. Multimode
   a. step index
   b. graded index
2. Single mode

Question 14

Jelaskan tentang Media Access Control?

Answer 14

Media access control is shared-media broadcast technology.
MAC performs three functions:
1. transmitting and receiving data packets
2. decoding data packets and checking them for valid addresses before passing them to the upper layers
3. detecting errors within data packets or on the network