NWC203c Computer Communication Verified Solutions
C
In HTTP, client initiates an HTTP session by opening a TCP connection to the HTTP server with which it
wishes to communicate ️Which of following protocol is HTTP built upon?
A. UDP
B. SMTP
C. TCP
D. IP
D ️Which of following req...
In HTTP, client initiates an HTTP session by opening a TCP connection to the HTTP server with which it
wishes to communicate ✔️Which of following protocol is HTTP built upon?
A. UDP
B. SMTP
C. TCP
D. IP
D ✔️Which of following requirements are necessary for packet networks to support multiple and
diverse applications?
A. Transfer arbitrary message size
B. Low delay for interactive applications
C. Packets have maximum length
D. All of the above
B
Refer to lecture on "Computer Network Evolution" ✔️What was the concern of the telephone system
that motivated the ARPANET design?
A. Scalability
B. Vulnerability
C. Efficiency
D. None of the above
,C
HTTP is used to send and receive data over the network - application layer ✔️Which of the following is
an application layer protocol?
A. DNS
B. UDP
C. HTTP
D. TCP
D
Refer to lecture on "Computer Network Evolution" ✔️Which of the following are features of ARPANET
design?
A. Connectionless packet transmission
B. Routing tables at the packet switches
C. Destinations identified by unique addresses
D. All of the above
D ✔️Bluetooth is an example of
A. Metropolitan Area Network
B. Wide Area Network
C. Local Area Network
D. Personal Area Network
C
Every layer adds its own header to the packet from previous layer ✔️In the layer hierarchy as the data
packet moves from the upper to the lower layers, headers are
,A. Rearranged
B. Removed
C. Added
D. Modified
C
Message travel from sender to receiver through a medium using protocol ✔️The ________ is the
physical path over which a message travels
A. Path
B. Protocol
C. Medium
D. Route
B
a communication channel between two or more clients of the network ✔️Three or more devices share
a link in ________ connection
A. Unipoint
B. Multipoint
C. Point to Point
D. None of the above
A
Refer to lecture slides ✔️Which of the following is true for Transport Control Protocol
A. Connection oriented
B. Process to Process
, C. Transport layer protocol
D. Connectionless
B
Physical address (also known as MAC address) is expected to uniquely identify each node on a segment
and allows frames to be marked for specific hosts. ✔️In a LAN, which address is used to transfer frames
to appropriate destination?
A. IP address
B. Physical address
C. Domain name
D. None of the above
B
Since message overhead includes - TCP: 20 bytes of header, IP: 20 bytes of header, and Ethernet: total
18 bytes of header and trailer. Therefore, the total message overhead is 58 bytes. 500/(500+58) = 90%
(approx.) ✔️Suppose an application layer entity wants to send an L-byte message to its peer process,
using an existing TCP connection. The TCP segment consists of the message plus 20 bytes of header. The
segment is encapsulated into an IP packet that has an additional 20 bytes of header. The IP packet in
turn goes inside an Ethernet frame that has 18 bytes of header and trailer. What is the bandwidth
utilization in terms of the percentage of the transmitted bits in the physical layer corresponds to
message information if L = 500 bytes?
A. 100%
B. 90%
C. 70%
D. 80%
D
Services provided by IP layer are addressing, fragmenting, packet timeouts ✔️Of the following services,
which service(s) does the IP layer provides?
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