WAN Technologies

Question 1

ISDN

Answer 1

Integrated Services Digital Network
circuit switched
used phone number to call another ISDN modem

Question 2

T1

Answer 2

circuit switched
dedicated lease line
24 channels
1.544 Mbps

Question 3

T3

Answer 3

circuit switched
dedicated lease line
672 channels
44.7 Mbps

Question 4

E1

Answer 4

European T1
circuit switched
dedicated lease line
30 channels
2Mbps

Question 5

E3

Answer 5

European T3
circuit switched
dedicated lease line
34.4 Mbps

Question 6

OC 3 - OC 192

Answer 6

Fiber Optics standard
typically now used by telcos to connect facilities together
OC1 ~52Mbps
Uses ATM

Question 7

DSL

Answer 7

Digital Subscriber Line
packet switched
uses phone lines
need to be close to central office

Question 8

Metro Ethernet

Answer 8

SMF hooked up between org’s facilities in a metro area
hooked up to ISP switches
choose your bandwidth
uses MLPS

Question 9

Dial-up

Answer 9

56kbps internet over phone line

Question 10

PRI

Answer 10

Primary Rate Interface
connection from PSTN to PBX
T1

Question 11

MPLS

Answer 11

Multi-Protocol Label Switching
packet switched
packets through WAN have a label

Question 12

ATM

Answer 12

Asynchronous Transfer Mode
packet switched
protocol transported over SONET
53 byte cells 48 data 5 routing header
constant send, high throughput
low latency
OC192 max speed

Question 13

Frame Relay

Answer 13

Used over T1/E1 links to get shared connection
shared infrastructure
router-> Frame Relay Switch ->Frame Relay cloud
packet switched

Question 14

PPP

Answer 14

Point to Point Protocol - 
Data over T1/E1
dial up
DSL
allows for authentication of endpoints

Question 15

PPPoE

Answer 15

Encapsulated PPP over Ethernet

Common on DSL

Question 16

DMVPN

Answer 16

Dynamic Multipoint VPN
a secure network that exchanges data between sites without needing to pass traffic through an organization’s headquarter VPN server or router.

Question 17

SIP trunk

Answer 17

VoIP connection to PSTN using TCP/IP

Question 18

CSU / DSU

Answer 18

Channel Service Unit / Data Service Unit -

Converts signal from Telco (CSU) so signal routers can interpret (DSU).

Question 19

Smart jack

Answer 19

acts as an interface
telco can monitor status of connection
alarm indicators, config sensors, etc

Question 20

Circuit Switching

Answer 20

Circuit established between endpoints before data passes
connection always there, no shared capacity
PSTN / POTS traditional phone system

Question 21

Packet Switching

Answer 21

Data grouped into packets and sent across network
Shared capacity/ media
Modern Internet