OSI Model

Question 1

What is the OSI Model (Open Systems Interconnection)

Answer 1

A model created in the 1980s by the International Organization for Standardization (ISO) as a part of its mission to create a protocol set to be used as a standard for all vendors

Question 2

What are the 7 layers of OSI model

Answer 2

Application
Presentation
Session
Transport
Network
Data Link
Physical

Question 3

What are the Functions of the Physical Level

Answer 3

Electrical signal
Bits to voltage

Question 4

What are the hardware/Formats at the Physical layer

Answer 4

Cables, HUB, USB, DSL, Repeaters, ATM

Question 5

What is the data at the physical layer

Answer 5

Bits

Question 6

What is the data at the data link layer

Answer 6

Frames

Question 7

What are the functions of the data link layer

Answer 7

Frames setup
Error detection and control
Check integrity of packets
Destination address
Frames use in MAC to IP address conversion

Question 8

What security is offered at the physical layer

Answer 8

Confidentiality

Question 9

What security is offered at the data link layer

Answer 9

Confidentiality

Question 10

What are some of the protocols offered at the data link layer

Answer 10

PPP
PPTP
L2TP
ARP
RARP
CHAP
MLP
HDLC
Ethernet
Token
Ring
FDDI

Question 11

What are the hardware/formats at the data link layer

Answer 11

Layer2 Switch
Bridges

Question 12

What is the data at the network layer

Answer 12

Packets

Question 13

What security is offered at the network layer

Answer 13

Confidentiality
Authentication
Integrity

Question 14

What are the functions of the network layer

Answer 14

Routing
Layer 3 switching
Segmentation
Logical Addressing
ATM
Packets

Question 15

What are some of the protocols offered at the network layer

Answer 15

ICMP
BGP
OSPF
RIP
IP
BOOTP
DHCP
ICMP

Question 16

What are the hardware/formats at the network layer

Answer 16

Layer 3 switch
router

Question 17

What is the data at the transport layer

Answer 17

Segment

Question 18

What security is offered at the transport layer

Answer 18

Confidentiality
Authentication
Integrity

Question 19

What are the functions of the transport layer

Answer 19

Segment
Connection oriented

Question 20

What are some of the protocols offered at the transport layer

Answer 20

TCP
UDP datagrams
Reliable end to end data transfer
Segmentation -sequencing and error checking

Question 21

What are the hardware/formats at the transport layer

Answer 21

Routers
VPN concentrators
Gateway

Question 22

What is the data at the session layer

Answer 22

Data

Question 23

What security is offered at the session layer

Answer 23

Non Repudiation

Question 24

What are the functions of the session layer

Answer 24

Data
Simplex
Half Duplex
Full Duplex
Peer Connctions

Question 25

What are some of the protocols offered at the session layer

Answer 25

TCP UDP NSF SQL RADIUS RPC PPTP PPP

Question 26

What are the hardware/formats at the session layer

Answer 26

Gateways

Question 27

What is the data at the presentation layer

Answer 27

Data

Question 28

What security is offered at the transport layer

Answer 28

Confidentiality Authentication Encryption

Question 29

What are the functions of the presentation layer

Answer 29

Data compression/decompression Encryption/Decryption

Question 30

What are some of the protocols offered at the presentation layer

Answer 30

TCP UDP messages

Question 31

What are the hardware/formats at the presentation layer

Answer 31

Gateways JPEG TIFF MID HTML

Question 32

What is the data at the application layer

Answer 32

Data

Question 33

What security is offered at the application layer

Answer 33

Confidentiality Authentication Integrity Non Repudiation

Question 34

What are the functions of the application layer

Answer 34

Data

Question 35

What are some of the protocols offered at the application layer

Answer 35

TCP UDP FTP TELNET TFTP SMTP HTTP CDP SSL

Question 36

What are the hardware/formats at the application layer

Answer 36

Gateways