OSI Model

Question 1

OSI Model

Answer 1

Open Systems Interconnection model (OSI model) is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system

Question 2

Physical Layer (Media Layer) # 1

Protocol Data Unit (PDU): Bit

Answer 2

Transmission and reception of raw bit streams over a physical medium

Cables, hubs, repeaters, etc

Physical medium transmission Bits & Volts
NO addressing

Question 3

Data Link (Media Layer) # 2

PDU: Frame

Answer 3

Reliable transmission of data frames between two nodes connected by a physical layer

MAC addressing, media accessing, error detection

Switch, bridges, Wireless Access Points (WAP)

Question 4

Network (Media Layer) # 3

PDU: Packet

Answer 4

Structuring and managing a multi-node network, including addressing, routing and traffic control

IPv4 and its addresses, logical addressing

Routers and Firewalls
Protocols: IP/IPX/ICMP

Packet Filtering

Question 5

Node

Answer 5

Any device or computer that can connect to a network and generate, process, or transfer data

Question 6

Segment

Answer 6

a subdivision of a network that links a number of devices or serves as a connection between two notes. All nodes attached to the segment have a common access to that portion of the network.

Question 7

Serial (Network Backbone)

Answer 7

Multiple switches connected to one backbone cable

Question 8

Layer 2 Ethernet Header includes ____

Answer 8

Source and Destination MAC addresses

Question 9

Layer 2 Ethernet Trailer includes ___

Answer 9

CRC = Cyclic Redundancy Check

an error detection process that includes the Ethernet Header, IP Header, TCP Header and the Data in the frame

Question 10

Demarcation Point

Answer 10

Telecommunication service entrance to the building, campus-wide backbone connections, and the interconnection to the local exchange carriers

Question 11

Backbone wiring

Answer 11

Connects equipment rooms and telecom closets

Question 12

Equipment room

Answer 12

The main cross-connection point for entire facility

Question 13

Telecommunications closet

Answer 13

House the connection equipment for cross-connection to equipment room along with workstations in the surrounding area

Question 14

Horizontal wiring

Answer 14

Runs from each workstation outlet to the telecommunication closet

Question 15

Work Area

Answer 15

Consists of wallboxes and faceplates, connectors, and wiring used to connect work area equipment to telecom closet.

Question 16

the collection of cables, connectors, and other devices that connect LAN and phone equipment within a commercial building

Answer 16

Premise wiring

Question 17

Used in the telephone industry to terminate telecom. low-bandwidth

Answer 17

66 Block

Question 18

Punch down block or cable termination block used for structured wiring systems; allow cross-connection to other punchdown blocks

Answer 18

110 Bloc

Question 19

Network cable that is jacketed tightly around conductors so that fire cannot travel within the cable; used in heating, ventilating and air conditioning

Answer 19

Plenum cable

Question 20

jacketed cable; gives off noxious of poisonous gases when burned

Answer 20

Polyvinyle chloride (PVC)

Question 21

Floor labeling (FS-AN labeling)

Answer 21

F (TIA 606b Standard)

Question 22

Telecom space on floor (Usually 1 letter)

FS-AN labeling

Answer 22

S

Question 23

Patch panel ID for Horizontal cross-connection

FS-AN labeling

Answer 23

A (1-2 characters)

Question 24

Port Number on Patch Panel

FS-AN labeling

Answer 24

N (2-4 numbers)