B2 Network Architecture

Question 1

Ethernet protocol

Answer 1

IEEE 802.3 Copper wire, fibre and wireless

Question 2

Cat 5 speed

Answer 2

100 megabit per sec 100baseT (short for 100 Megabit baseband and T for twisted pair)

Question 3

Cat 5 e speed

Answer 3

1000baseT (1 Gigabit per sec)

Question 4

Cat 6 speed

Answer 4

10 Gbit per sec

Question 5

Fibre modes

Answer 5

multimode - thicker, light can smear restrict distance

single mode, thinner used for long distance

Question 6

Wireless network IEEE 802.11 freq bands

Answer 6

2.4, 3.6, 5 and 60 Ghz

Question 7

802.11 speed

Answer 7

1-2Mbps, rarely seen uses 2.4 Ghz

Question 8

802.11a speed

Answer 8

54Mbps in 5 Ghz (most common in US)

Question 9

802.11b speed

Answer 9

11Mbps in 2.4 Ghz

Question 10

802.11g speed

Answer 10

54Mbps 2.4Ghz short range

Question 11

802.11n speed

Answer 11

builds on 802.11 multiple input multiple output (MIMO) 100Mbps

Question 12

802.11ac

Answer 12

Bulds on n using 3 antenna to get 1.3Gbps in 5 Ghz.

Question 13

Network Address Translation, or NAT types

Answer 13

Full cone (1 to 1 or port forwarding)
address restricted cone
port restricted cone
symmetric

Question 14

Full cone NAT

Answer 14

allows inbound conections from any external host, sending to one device on network, using one approved port. if wrong port used, will fail.

Question 15

address restricted cone NAT

Answer 15

same as full cone but device within network must have sent packets to an external ip address before it can send packets to it.

Question 16

port restricted cone nat

Answer 16

same as address restricted but will only accpet packets from an external ip and port that the private host has sent packets to.

Question 17

symmetric nat

Answer 17

will assign random ports even for same host but different session