Lesson 1: OSI and TCP/IP models

Question 1

LAN meaning

Answer 1

local area network

Question 2

WAN meaning

Answer 2

wide area network

Question 3

Protocol Data Units (PDUs) are

Answer 3

rule for exchanging data

Question 4

encapsulation

Answer 4

describes how data should be packaged for transmission

Question 5

layer 1 PDU name

Answer 5

bit stream

Question 6

layer 2 PDU name

Answer 6

frames

Question 7

layer 3 PDU name

Answer 7

packet

Question 8

layer 4 PDU name

Answer 8

segment (datagrams)

Question 9

layer 5-7 PDU name

Answer 9

data

Question 10

TCP

Answer 10

connection established flow control

Question 11

UDP

Answer 11

unreliable (connectionless) security applications (firewalls)

Question 12

layer 2 deals with

Answer 12

MAC addresses

Question 13

layer 3 deals with

Answer 13

IP addresses

Question 14

layer 4 deals with

Answer 14

logic ports and firewalls

Question 15

layer 1

Answer 15

phsyical

Question 16

layer 2

Answer 16

data link (MAC addresses)

Question 17

layer 3

Answer 17

network (IP addresses)

Question 18

layer 4

Answer 18

transport

Question 19

layer 5

Answer 19

session

Question 20

layer 6

Answer 20

presentation

Question 21

layer 7

Answer 21

application

Question 22

can layer 1 devices address?

Answer 22

no

Question 23

List layer 1 devices

Answer 23

transceiver, media converter, hub/repeater, and modum

Question 24

list layer 2 devices

Answer 24

basic switch, NIC, wireless access point

Question 25

list layer 3 devices

Answer 25

layer 3 switch, router, basic firewalll