The delay characteristics for the segments (including the processing at the swit

Question

The delay characteristics for the segments (including the processing at the switches are as follows: for each GigE segment 100ps; for the PoS OC-48 segment between routers 1 ms; for each FE segment 200us. and for the security firewall 5ms. The interfaces on the firewall are Fast Ethernet. What is the end-to-end delay in the direction from PC to server Before the security firewall After the security firewall added Which of the following applications require best-effort (unpredictable and unreliable), guaranteed (predictable and reliable, with accountability), or predictable service Give reasons for your choices. Voice over IP(VoIP) calls File Transfers via FTP Audio file downloads A commercial video-on-demand service User access to servers in a corporation Why is requirements analysis important to network architecture and design? Give three reasons.

Explanation / Answer

Answer:

Voice over IP is a reliable communication.That means acknowledgment is must and hence guarenteed.

3. Before designing any network , it is most prefered act to anaylse its requirements . Because :

a) Different networking protocols require different requirements ( Like reliable and unreliable ).

b) Type of network we have to desig ( LAN or WAN) - WAN requires more routers and LAN more switches.

c) Protocols used ( UDP , TCP --- ).

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