Network WAN Protocols

Question 1

Explain T1, T3, E1, E3

Answer 1

T1: 1.544MB Circuit-Carries 24 64-bit Channels
T3: 44.736MB Circuit-Carries 28 T1s
E1: 2.048MB Circuit-Carries 30 64-bit Channels
E3: 34.368MB Circuit

Question 2

Explain SONET

Answer 2

Carries multiple T-carrier circuits via fiber optics, using a physical fiver ring for redundancy.

Question 3

Frame Relay

Answer 3

Packet Switched, Layer 2, no recovery, high speed

Question 4

X.25

Answer 4

Packet Switched, Layer 2, Provides error correction

Question 5

ATM

Answer 5

Asynchronous Transfer Mode

Fixed Length Cells, 53 bytes long

Question 6

MPLS

Answer 6

Multiprotocol Label Switching

Carries many types of protocols, using labels

Question 7

SDLC

Answer 7

Synchronous Data Link Control
Layer 2
Polling
Only supports Normal Response Mode (NRM)

Question 8

HDLC

Answer 8

High-Level Data Link Control
Error Correction and Flow Control
Normal Response Mode
Asynchronous Response Mode
Asynchronous Balanced Mode

Question 9

Explain FCoE

Answer 9

Fibre Channel over Ethernet
Does not use TCP/IP
Storage Area Network (SAN) Protocol

Question 10

Explain FCIP

Answer 10

Fibre Channel over IP
Uses TCP/IP
Storage Area Network (SAN) Protocol

Question 11

Explain ISCSI

Answer 11

Internet Small Computer System Interface
Uses TCP/IP
Storage Area Network (SAN) Protocol