UNIT IV INTERNETWORKING BETWEEN WLANS AND WWANS

A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?

• Send a different source port number.
• Restart the virtual circuit.
• Decrease the sequence number.
• Decrease the window size.

When data is encapsulated, which is the correct order?

• Data, frame, packet, segment, bit
• Segment, data, packet, frame, bit
• Data, segment, packet, frame, bit
• Data, segment, frame, packet, bit

What is the data rate or speed offered by a GPRS connection?

• 56-115kbps
• 9-256kbps
• 64-128kbps
• None

GPRS uses which unused channels for transportation of Data in general?

• SDCCH
• BCCH
• TCH
• SCH

Type-A Mobile Station supports ________.

• Only Speech
• Only Data
• Speech and Data Simultaneously
• Speech or Data one at a time.

What is the maximum speed offered by an EDGE connection?

• 64kbps
• 128kbps
• 256kbps
• 236 kbps

A PCU separates Packet  Switched and Circuit Switched traffic and passes PSD to _______?

• MSS
• SGSN
• GGSN
• None

Which is the system in GPRS that connects to External Networks using GTP?

• SGSN
• HLR
• GGSN
• GMSC

What are the functions of SGSN in a GPRS Architecture?

• Authentication, Authorization, Ciphering
• GTP tunneling to GGSN, Charging (Billing), Session management
• Mobility manage, interaction with HLR, MSC/VLR, NMS interface
• ALL

A DNS (Domain Name Server) converts Host Name or Website name to _____?

• Packets
• Bytes
• IP address
• NONE