Internet Architecture

Question 1

Meaning: RFC

Answer 1

Request for comments

Question 2

Meaning: IETF

Answer 2

Internet Engineering Task Force

Question 3

Network Edge, Hosts

Answer 3

server, client, p2p

Question 4

Network Edge, Applications

Answer 4

http, mail, Facebook, Twitter

Question 5

Network Core

Answer 5

Interconnection of routers using fiber + naming services

Question 6

(what are) Access Networks

Answer 6

Wired or wireless communication links

Question 7

Point to Point Protocol (PPP)

Answer 7

Dialup, DSL, Broadband over power line

Question 8

DSLAM stands for?

Answer 8

Digital subscriber line access multiplier

Question 9

POTS stands for?

Answer 9

Plain old telephone service

Question 10

CMTS stands for?

Answer 10

Cable modem termination system

Question 11

HFC stands for?

Answer 11

Hybrid fiber coax

Question 12

ITU stands for?

Answer 12

International telecommunication unit

Question 13

What is G.hn?

Answer 13

Standard for wired home connectivity, offers between 200 and 400 mbps throughput

Question 14

NAT stands for?

Answer 14

Network Address Translation

Question 15

IPS stands for?

Answer 15

Intrusion prevention system

Question 16

ATM stands for?

Answer 16

Asynchronous transfer mode

Question 17

802.11 a/b/g speed

Answer 17

11 or 52 mbps

Question 18

802.11 n speed

Answer 18

> 100 mbps

Question 19

802.11 ac speed

Answer 19

> 430 mbps

Question 20

Wider Area Wireless Access speed

Answer 20

~1mbps over cellular system (EVDO, HSDPA, LTE)

Question 21

Transmission Line

Answer 21

Signals propagate in a medium (e.g Ethernet, coax, fiber)

Question 22

Free space

Answer 22

Signals propagate in free space (e.g radio waves, LAN, satellite)

Question 23

Tiers of ISPs?

Answer 23

Tier 1 = global

Tier 2 = regional

Question 24

IXP stands for? And what are they?

Answer 24

Internet exchange points, where backbones of tier-1 ISPs are connected