7CSE3213_02_PacketSwitchingW2012

7CSE3213_02_PacketSwitchingW2012 - no blocked traffic –...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
31 Circuit vs. Packet Switching Circuit-Switched Networks ( telephone networks ) Advantages circuit establishment delay circuit establishment introduces ‘initial delay’ inefficient use of capacity channel capacity is dedicated for the duration of a connection, even if no data is being transferred (e.g. silent periods in speech) network complexity end-to-end circuit establishment and bandwidth allocation requires complex signaling software to coordinate operation of switches Disadvantages guaranteed Quality of Service data is transmitted at fixed (guaranteed) rate; delay at nodes is negligible
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
32 Circuit vs. Packet Switching (cont.) Advantages greater line efficiency network links are dynamically shared by many packets / connections
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: no blocked traffic – packets are accepted even under heavy traffic, but delivery delay may increase variable delay – each node introduces additional variable delay due to processing and queueing overhead – to route packets through a packet-switching network, overhead information including the address of destination and/or sequence information must be added to each packet Disadvantages Packet-Switched Networks ( the Internet ) 33 Trends in Network Evolution It’s all about services – Building networks involves huge expenditures – Services that generate revenues drive the network architecture Current Trends – Packet Switching vs. Circuit Switching – Multimedia Applications – Many service providers and overlay networks...
View Full Document

This note was uploaded on 02/14/2012 for the course CSE 3213 taught by Professor A during the Winter '10 term at York University.

Page1 / 3

7CSE3213_02_PacketSwitchingW2012 - no blocked traffic –...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online