CS6250 Computer Networks Exam 1
Study Set Summer 2025/2026
"Routing" and "forwarding" are interchangeable phrases - ANS-False
*** Look at the unibit trie questions - ANS-
*** Review the diagrams quiz questions for quiz four - ANS-
A Content Distribution Network (CDN) or ISP can perform over a couple of Autonomous
Systems - ANS-True
A sending host receives a message from the software layer and encapsulates it with the
shipping layer header before passing it all the way down to the community layer - ANS-True
According to the quit-to-cease principle, where must maximum of the Internet's
capability/intelligence be implemented? - ANS-At the rims of a network
According to the hot potato routing approach, it's miles in a community's pleasant hobby to
direction the traffic in order that it exits the community on the router geographically closest to
the only from which it entered the community - ANS-False
An software running on a host can bind to multiple sockets concurrently - ANS-True
An AS can use LocalPref to govern which routers are used as exit factors (for the outgoing
traffic), and it could use the MED characteristic to manipulate which routers are used as
entry factors (for the incoming traffic) - ANS-True
AN IXP route server does not want to run the BGP protocol to facilitate the status quo of
multi-lateral peering classes - ANS-False
As Autonomous System operates throughout multiple administrative domains - ANS-False
Assume a source and destination host. As packets travel over a path from the source host to
the destination host the packets are dealt with by using multiple routers over that direction. If
these routers belong to one-of-a-kind administrative domain names, they need to run the
same intradomain routing set of rules, given that they may be on the same path for that pair
of hosts - ANS-False
Assume Hosts A, B, and C. Host A has a UDP socket with port 123. Hosts B and C each
send their very own UDP segment to Host A. Hosts B and C can not use the identical
destination port 123 for sending their UDP segment - ANS-False
At an IXP, the individuals have a preference to see privately or publicly - ANS-True
Both the records hyperlink and transports layer protocols may additionally offer error
correction - ANS-True
By stride we discuss with the range of bits that we check at every step when traversing a
trie. - ANS-True
Congestion manage is a charge manipulate mechanism to guard the network from
congestion - ANS-True
Consider a community with more than one egress factors. Further do not forget that these
egress points offer distinct paths to the identical external locations. Then those paths should
have distinct expenses - ANS-False
Consider a router with the forwarding desk:
Prefix Match Output Link
, 11100000 00* A
11100000 01000000* B
1110000* C
11100001 1* D
otherwise E
Given that the router uses longest prefix matching, determine the output link for packet with
destination IP deal with:
10001000 11110001 01010001 11110101
A
B
C
D
E - ANS-E
Consider a router with the forwarding table:
Prefix Match Output Link
11100000 00* A
11100000 01000000* B
1110000* C
11100001 1* D
in any other case E
Given that the router makes use of longest prefix matching, determine the output hyperlink
for packet with vacation spot IP address:
11100001 10000000 00010001 01110111
A
B
C
D
E - ANS-D
Consider a supply and destination host. Before packets leave the supply host, the host
needs to outline the path over which the packets will tour to attain the vacation spot host -
ANS-False
Consider a TCP connection and a diagram showing the congestion because it progresses.
From the diagram, while we observe the congestion window drop to its initial price, we infer
that a packet loss passed off - ANS-True
Study Set Summer 2025/2026
"Routing" and "forwarding" are interchangeable phrases - ANS-False
*** Look at the unibit trie questions - ANS-
*** Review the diagrams quiz questions for quiz four - ANS-
A Content Distribution Network (CDN) or ISP can perform over a couple of Autonomous
Systems - ANS-True
A sending host receives a message from the software layer and encapsulates it with the
shipping layer header before passing it all the way down to the community layer - ANS-True
According to the quit-to-cease principle, where must maximum of the Internet's
capability/intelligence be implemented? - ANS-At the rims of a network
According to the hot potato routing approach, it's miles in a community's pleasant hobby to
direction the traffic in order that it exits the community on the router geographically closest to
the only from which it entered the community - ANS-False
An software running on a host can bind to multiple sockets concurrently - ANS-True
An AS can use LocalPref to govern which routers are used as exit factors (for the outgoing
traffic), and it could use the MED characteristic to manipulate which routers are used as
entry factors (for the incoming traffic) - ANS-True
AN IXP route server does not want to run the BGP protocol to facilitate the status quo of
multi-lateral peering classes - ANS-False
As Autonomous System operates throughout multiple administrative domains - ANS-False
Assume a source and destination host. As packets travel over a path from the source host to
the destination host the packets are dealt with by using multiple routers over that direction. If
these routers belong to one-of-a-kind administrative domain names, they need to run the
same intradomain routing set of rules, given that they may be on the same path for that pair
of hosts - ANS-False
Assume Hosts A, B, and C. Host A has a UDP socket with port 123. Hosts B and C each
send their very own UDP segment to Host A. Hosts B and C can not use the identical
destination port 123 for sending their UDP segment - ANS-False
At an IXP, the individuals have a preference to see privately or publicly - ANS-True
Both the records hyperlink and transports layer protocols may additionally offer error
correction - ANS-True
By stride we discuss with the range of bits that we check at every step when traversing a
trie. - ANS-True
Congestion manage is a charge manipulate mechanism to guard the network from
congestion - ANS-True
Consider a community with more than one egress factors. Further do not forget that these
egress points offer distinct paths to the identical external locations. Then those paths should
have distinct expenses - ANS-False
Consider a router with the forwarding desk:
Prefix Match Output Link
, 11100000 00* A
11100000 01000000* B
1110000* C
11100001 1* D
otherwise E
Given that the router uses longest prefix matching, determine the output link for packet with
destination IP deal with:
10001000 11110001 01010001 11110101
A
B
C
D
E - ANS-E
Consider a router with the forwarding table:
Prefix Match Output Link
11100000 00* A
11100000 01000000* B
1110000* C
11100001 1* D
in any other case E
Given that the router makes use of longest prefix matching, determine the output hyperlink
for packet with vacation spot IP address:
11100001 10000000 00010001 01110111
A
B
C
D
E - ANS-D
Consider a supply and destination host. Before packets leave the supply host, the host
needs to outline the path over which the packets will tour to attain the vacation spot host -
ANS-False
Consider a TCP connection and a diagram showing the congestion because it progresses.
From the diagram, while we observe the congestion window drop to its initial price, we infer
that a packet loss passed off - ANS-True
