Networking

Question 1

What is Layer 1 of the OSI model

Answer 1

Physical layer

Question 2

Describe the physical layer of the OSI model

Answer 2

defines physical means of sending bits from one device to another. The physical layer doesn’t change the data in any way

Question 3

What is Layer 2 of the OSI model

Answer 3

Data link layer

Question 4

Describe the data link layer of the OSI model

Answer 4

responsible for transferring data without errors. switch to switch or router to router communication. Converts packets into frames adding the MAC of the source and destination device.

Question 5

What is layer 3 of the OSI model

Answer 5

Network Layer

Question 6

Describe the network layer of the OSI model

Answer 6

Addresses packets and routes them to their address on the network. Translates between MAC and IP. Data unit associated with this layer is packets

Question 7

What is layer 4 of the OSI model

Answer 7

Transport Layer

Question 8

Describe the transport layer of the OSI model

Answer 8

Manages end to end message delivery. divides long packets into smaller segments & re assembles them. Ports are a transport layer technology

Question 9

What is layer 5 of the OSI model

Answer 9

Session layer

Question 10

Describe the session layer of the OSI model

Answer 10

Allows 2 applications on different devices to communicate. establishes session, manages it and ends it.

Question 11

What is layer 6 of OSI model

Answer 11

Presentation Layer

Question 12

Describe the presentation layer of the OSI model

Answer 12

Translates data to an intermediate form that masks the difference between data types i.e. word file vs. video file. compresses data to reduce bit size. May also encrypt & decrypt data

Question 13

What is layer 7 of the OSI model

Answer 13

Application layer

Question 14

Describe the application layer of the OSI model

Answer 14

Give applications access to network services i.e. email, FTP, databases.

Question 15

What functions are covered by the Internet Protocol

Answer 15

Addressing, Packaging, Fragmenting, Routing

Question 16

What address type: 10.0.0.0/8

Answer 16

Private large network

Question 17

What address type: 127.0.0.0/8

Answer 17

Loopback address range

Question 18

What address type: 169.245.0.0/6

Answer 18

APIPA automatic private ip addressing

Question 19

What address type: 192.168.0.0/16

Answer 19

Private small to medium

Question 20

What address type: 224.0.0.0/4

Answer 20

Multicast address range

Question 21

What address type: 255.255.255.255

Answer 21

Broadcast

Question 22

What address type: 172.16.0.0/12

Answer 22

Private medium to large

Question 23

Cat 5e

Answer 23

up to 100 MHz, 100 Mbps and 1 Gps

Question 24

Cat 6

Answer 24

up to 250 MHz – typically both 100 Mbps and 1 Gbps

Question 25

Cat 6a

Answer 25

up to 500 MHz – typically 10 Gbps

Question 26

Cat 7

Answer 26

up to 600 MHz – typically 10 Gbps

Question 27

Cat 7a

Answer 27

up to 1000 MHz – suitable for 40 Gbps

Question 28

Acronym for OSI model

Answer 28

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