WAN technology

Question 1

whats frame relay?

Answer 1

-packet switched technology which allows multiple systems to communicate on the same structure without any direct communication
-can monitor the amount of traffic on the system and if the system gets too busy it can be configured not to overload
-This feature of reconstructing is useful for telecommunications and video traffic

Question 2

whats packet switching?

Answer 2

• where different packets of the same message may take different routes

Question 3

whats ISDN?

Answer 3

-integrated switched digital network
-circuit switched technology
- has the capacity to have a separate channel for data and voice
-has two levels of service;
BRI- basic rate interface, for small businesses or home users.
PRI- primary rate interface, for medium to large companies

Question 4

interface specs- BRI

Answer 4

• can have two “B” channels
  -for 64bps (voice or data)
• one “D” channel of 64bps
  -allow up to 30 voice lines or data lines
  -or one data line of 1.9mbps capacity

Question 5

ATM

Answer 5

• asynchronous transfer mode
• very similar to frame relay
• main difference is the size of the packets sent
• ATM the packets are called cells and are smaller than frame relay
  -means that it has better speed and reliability