Abbreviations

Question 1

MAN

Answer 1

In size between LAN and WAN, managed by large organisation

Question 2

DSL

Answer 2

Phone line, high bandwidth

Question 3

DLL

Answer 3

Private leased line, expensive, for company

Question 4

SMF (price, distance, core size)

Answer 4

Powered by strong laser, good for long distances, small cores

Question 5

MMF (price, distance, core size)

Answer 5

Powered by cheap LED, short distances, bigger core

Question 6

PPP

Answer 6

Provides a means to transmit over serial link

Question 7

Serial port (connect to what with what)

Answer 7

Used to connect to switch using rollover cable

Question 8

FCS (What for, how, where, size)

Answer 8

Used to detect errors in a frame. Uses a Cyclic Redundancy Check (CRC). Both sender and receiver perform CRC. If the results don’t match the frame is dropped. Is in the trailer of the Ethernet frame. 4 bytes long.

Question 9

SFD (what for, how, where, size)

Answer 9

Part of the Preamble, determines start of frame. 1 byte long.

Question 10

CRC

Answer 10

Both sender and receiver perform CRC. If the results don’t match the frame is dropped. Is in the trailer of the Ethernet frame. Used for error checking

Question 11

MTU

Answer 11

Each medium has it’s own MTU determining max size of packets. The Data Link Layer tells the Network layer about it.

Question 12

DSCP (what for, how, where, size)

Answer 12

Part of DS, 6 bits

Question 13

ECN (what for, how, where, size)

Answer 13

Part of DS, 2 bits

Question 14

DS (what for, how, where, size)

Answer 14

Used to determine the priority of each packet. 8 bits long.

Question 15

APIPA (what is the IP range)

Answer 15

169.254.0.1 t/m 169.254.255.254

Question 16

NAT64

Answer 16

Translate IPv6 to IPv4

Question 17

GUA

Answer 17

Global Unicast Address, Same as public IPv4

Question 18

RA

Answer 18

Router Advertisement

Question 19

RS

Answer 19

Router Sollicitation

Question 20

EUI-66 (what are the steps)

Answer 20

Split MAC between OUI and device identifier, instert FFFE, swap 7th bit

Question 21

DAD (what, how)

Answer 21

Duplicate Address Detection

Question 22

NDP

Answer 22

Neighbour Detection Protocol. Uses NS and NA. Sends a NS with it’s own IP and hopes not to get a NA back from someone with that IP.

Question 23

NS

Answer 23

Neighbour Solicitation

Question 24

NA

Answer 24

Neighbour Advertisement

Question 25

CTL

Answer 25

Control Bit. SYN ACK FIN RST

Question 26

ISN

Answer 26

Initial Sequence Number, is a random number