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PROGRAM Master of Science in Information Technology(MSc IT)Revised
Fall 2011
SEMESTER 3
SUBJECT CODE &
NAME
MIT3031–
High Speed Networks
Qus:1
What are the advantages of virtual path connection (VPC)? Explain.
Answer:
The
advantages of virtual path connection (VPC):
A virtual path
connection (VPC) is a bunch of VCCs share the same endpoints where all the
cells flowing over all the VCCs in a single VPC are switched together. Grouping
connections that share a common path over the
Qus:2
List and explain the issues that we need to resolve while using a mixed ATM LAN
architecture?
Answer:
The
issues that we need to resolve while using a mixed ATM LAN architecture:
·
Difference
in protocols – In connectionless protocols like
Ethernet, a station can send data packets to another station without
establishing or terminating a connection. But connection-
Qus:3
Discuss on Multi-server queue.
Answer:
Multi-server
queue:
In a multi-server
queuing system, multiple servers share a common queue. If a packet arrives and
at least one server is available, then the packet is immediately sent to the
available server. If no server is available, the arriving packets form a queue.
When a server becomes free, a request is sent to that server. Figure
Qus:4
What are the objectives that are defined for frame relay congestion control?
Answer:
The
objectives that are defined for frame relay congestion control:
The following
objectives are defined for frame relay congestion control:
·
Minimize
frame discard.
·
Maintain
an
Qus:5
List the timers that TCP maintains for every connection? Explain any three.
Answer:
The
timers that TCP maintains for every connection:
There are seven
timers that TCP maintains for every
connection and
they are:
·
SYNACK
timer
·
Retransmit
timer
·
Delayed
ACK timer
·
Keep
alive timer
·
Probe
timer
·
FinWait2
timer
·
TWKill timer
Ø SYNACK timer –
This timer is utilized when a TCP instance changes its state from LISTEN to
SYN_
Qus:6
What is Multi-Protocol Label Switching (MPLS)? Explain.
Answer:
Multi-Protocol
Label Switching (MPLS):
Multi-Protocol
Label Switching (MPLS), is a data packet forwarding technology that has
enhanced the forwarding speed of routers by utilizing labels for making
decisions regarding data forwarding. Multiprotocol Label Switching (MPLS) is a
versatile solution that meets the bandwidth
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