ISDN

Expand ISDN

• Integrated Services Digital Network

• Inverted Services Digital Network

• Integrated Services Display Network

• Inverted Services Display Network

How many layers are present in ISDN Network

• 2

• 3

• 4

• 5

ISDN is a digital Service

• True

• False

Identify the disadvantage of ISDN

• High Data Range

• Takes only 2 seconds for connecting

• Costly

• Facilitates user with multiple digital channels

Identify the layers present in ISDN.

• 1. Physical layer , Data link layer, Network layer

• Physical layer, Presentation, Application layer

• Data link layer, Session layer, Transport layer

• Network layer, Session layer, Physical layer