Wireless & Mobile Communications Multiple Choice Questions on “TCP over Wireless”.
1. A packet in Transmission Control Protocol (TCP) is called a ____________
a) Transmittable slots
b) Packet
c) Segment
d) Source Slots
Answer: c
Clarification: Applications working at the Application Layer transfers a contiguous stream of bytes to the bottom layers. It is the duty of TCP to pack this byte stream to packets, known as TCP segments, which are passed to the IP layer for transmission to the destination device.
2. Cable TV and DSL are examples of ____________
a) Interconnection of network
b) LAN
c) MAN
d) WAN
Answer: c
Clarification: A MAN often acts as a high speed network to allow sharing of regional resources. It typically covers an area of between 5 and 50 km diameter. Examples of MAN are telephone company network that provides a high speed DSL to customers and cable TV network.
3. Station on a wireless ALOHA network is maximum of ________
a) 400 Km
b) 500 Km
c) 600 Km
d) 700 Km
Answer: c
Clarification: The stations on wireless ALOHA networks are a maximum of 600 km apart. It was designed for a radio (wireless) LAN, but it can be used on any shared medium. It is obvious that there are potential collisions in this arrangement. The medium is shared between the stations.
4. IEEE 802.11 defines basic service set as building block of a wireless ___________
a) LAN
b) WAN protocol
c) MAN
d) ALOHA
Answer: a
Clarification: The IEEE 802.11 topology consists of components interacting to provide a wireless LAN. It enables station mobility transparent to higher protocol layers, such as the LLC.
5. In wireless LAN, there are many hidden stations so that __________ cannot be detected.
a) Frames
b) Collision
c) Signal
d) Data
Answer: b
Clarification: In wireless networking, the hidden node problem or hidden terminal problem occurs when a node is visible from a wireless access point (AP), but not from other nodes communicating with said AP. This leads to difficulties in media access control and collisions could not be detected.
6. A set that makes stationary or mobile wireless station and also have optional central base station is known as ___________
a) Basic service set
b) Extended service set
c) Network point set
d) Access point
Answer: a
Clarification: A set that makes stationary or mobile wireless station and also have optional central base station is known as a basic service set. BSS is made of stationary or mobile wireless stations and an optional central base station, known as the access point (AP).
7. Wireless communication started in _________
a) 1869
b) 1895
c) 1879
d) 1885
Answer: b
Clarification: In England, Guglielmo Marconi began his wireless experiments in 1895. On 2 June 1896, he filed his provisional specification of a patent for wireless telegraphy. He demonstrated the system to the British Post Office in July.
8. Wireless transmission is divided into ___________
a) 3 broad groups
b) 6 broad groups
c) 9 broad groups
d) 8 broad groups
Answer: a
Clarification: We can divide wireless transmission into three broad groups: radio waves, microwaves, and infrared waves. Radio waves are used for multicast communications, such as AM and FM radio, television, maritime radio, cordless phones and paging systems. Microwave propagation is line-of-sight.
9. Transmission Control Protocol/Internet Networking Protocol have ___________
a) Four Layers
b) Five Layers
c) Six Layers
d) Seven Layers
Answer: a
Clarification: TCP/IP functionality is divided into four layers, each with its own set of agreed-upon protocols: The datalink layer consists of methods and protocols that operate only on a link. The Internet layer connects independent networks to transport the packets. The Transport layer handles communications between. The Application layer standardizes data exchange for applications.
10. Packets of data that is transported by IP is called __________
a) Datagrams
b) Frames
c) Segments
d) Encapsulate message
Answer: a
Clarification: The format of data that can be recognized by IP is called an IP datagram. It consists of two components, the header and data, which need to be transmitted. The fields in the datagram, except the data, have specific roles to perform in the transmission of data.
11. Parameter that is normally achieved through a trailer added to end of frame is ___________
a) Access Control
b) Flow Control
c) Error Control
d) Physical addressing
Answer: c
Clarification: The data link layer adds reliability to the physical layer by adding mechanisms to detect and retransmit damaged or lost frames. It also uses a mechanism to recognize duplicate frames. Error control is normally achieved through a trailer added to the end of the frame.
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