IBPS SPECIALIST OFFICER IT STUDY MATERIAL ON NETWORKING
1.
Define Network?
A network is a set of devices
connected by physical media links. A network is recursively is a connection of
two or more nodes by a physical link or two or more networks connected by one
or more nodes.
2.
What is a Link?
At the lowest level, a
network can consist of two or more computers directly connected by some
physical medium such as coaxial cable or optical fiber. Such a physical medium
is called as Link.
3.
What is a node?
A network can consist of two
or more computers directly connected by some physical medium such as coaxial
cable or optical fiber. Such a physical medium is called as Links and the
computer it connects is called as Nodes.
4.
What is a gateway or Router?
A node that is connected to
two or more networks is commonly called as router or Gateway. It generally
forwards message from one network to another.
5.
What is point-point link?
If the physical links are
limited to a pair of nodes it is said to be point-point link.
6.
What is Multiple Access/multipoint ?
If the physical links are
shared by more than two nodes, it is said to be Multiple Access.
7.
What are the advantages of Distributed Processing?
a. Security/Encapsulation
b. Distributed database
c. Faster Problem solving
d. Security through redundancy
e. Collaborative Processing
b. Distributed database
c. Faster Problem solving
d. Security through redundancy
e. Collaborative Processing
8.
What are the criteria necessary for an effective and efficient network?
a. Performance
It can be measured in many ways, including transmit time and response time. b. Reliability
It is measured by frequency of failure, the time it takes a link to recover from a failure, and the network's robustness.
c. Security
Security issues includes protecting data from unauthorized access and virues.
It can be measured in many ways, including transmit time and response time. b. Reliability
It is measured by frequency of failure, the time it takes a link to recover from a failure, and the network's robustness.
c. Security
Security issues includes protecting data from unauthorized access and virues.
9.
Name the factors that affect the performance of the network?
a. Number of Users
b. Type of transmission medium
c. Hardware
d. Software
b. Type of transmission medium
c. Hardware
d. Software
10.
Name the factors that affect the reliability of the network?
a. Frequency of failure
b. Recovery time of a network after a failure
b. Recovery time of a network after a failure
11.
Name the factors that affect the security of the network?
a. Unauthorized Access
b. Viruses
b. Viruses
12.
What is Protocol?
A protocol is a set of rules
that govern all aspects of information communication.
13.
What are the key elements of protocols?
The key elements of protocols
are
a. Syntax
It refers to the structure or format of the data, that is the order in which they are presented.
b. Semantics
It refers to the meaning of each section of bits.
c. Timing
Timing refers to two characteristics: When data should be sent and how fast they can be sent.
a. Syntax
It refers to the structure or format of the data, that is the order in which they are presented.
b. Semantics
It refers to the meaning of each section of bits.
c. Timing
Timing refers to two characteristics: When data should be sent and how fast they can be sent.
14.
What are the key design issues of a computer Network?
a. Connectivity
b. Cost-effective Resource Sharing
c. Support for common Services
d. Performance
b. Cost-effective Resource Sharing
c. Support for common Services
d. Performance
15.
Define Bandwidth and Latency?
Network performance is
measured in Bandwidth (throughput) and Latency (Delay). Bandwidth of a network
is given by the number of bits that can be transmitted over the network in a
certain period of time. Latency corresponds to how long it takes a message to
travel from one end off a network to the other. It is strictly measured in
terms of time.
16.
Define Routing?
The process of determining
systematically how to forward messages toward the destination nodes based on
its address is called routing.
17.
What is a peer-peer process?
The processes on each machine
that communicate at a given layer are called peer-peer process.
18.
When a switch is said to be congested?
It is possible that a switch
receives packets faster than the shared link can accommodate and stores in its
memory, for an extended period of time, then the switch will eventually run out
of buffer space, and some packets will have to be dropped and in this state is
said to congested state.
25.
What is WDM?
WDM is conceptually the same
as FDM, except that the multiplexing and demultiplexing involve light signals
transmitted through fiber optics channel.
26.
What is TDM?
TDM is a digital process that
can be applied when the data rate capacity of the transmission medium is
greater than the data rate required by the sending and receiving devices.
27.
What is Synchronous TDM?
In STDM, the multiplexer allocates
exactly the same time slot to each device at all times, whether or not a device
has anything to transmit.
28.
List the layers of OSI
a. Physical Layer
b. Data Link Layer
c. Network Layer
d. Transport Layer
e. Session Layer
f. Presentation Layer
g. Application Layer
b. Data Link Layer
c. Network Layer
d. Transport Layer
e. Session Layer
f. Presentation Layer
g. Application Layer
29.
Which layers are network support layers?
a. Physical Layer
b. Data link Layer and
c. Network Layers
b. Data link Layer and
c. Network Layers
30.
Which layers are user support layers?
a. Session Layer
b. Presentation Layer and
c. Application Layer
b. Presentation Layer and
c. Application Layer
31.
Which layer links the network support layers and user support layers?
The Transport layer links the
network support layers and user support layers.
32.
What are the concerns of the Physical Layer?
Physical layer coordinates
the functions required to transmit a bit stream over a physical medium.
a. Physical characteristics of interfaces and media
b. Representation of bits
c. Data rate
d. Synchronization of bits
e. Line configuration
f. Physical topology
g. Transmission mode
a. Physical characteristics of interfaces and media
b. Representation of bits
c. Data rate
d. Synchronization of bits
e. Line configuration
f. Physical topology
g. Transmission mode
33.
What are the responsibilities of Data Link Layer?
The Data Link Layer
transforms the physical layer, a raw transmission facility, to a reliable link
and is responsible for node-node delivery.
a. Framing
b. Physical Addressing
c. Flow Control
d. Error Control
e. Access Control
a. Framing
b. Physical Addressing
c. Flow Control
d. Error Control
e. Access Control
34.
What are the responsibilities of Network Layer?
The Network Layer is
responsible for the source-to-destination delivery of packet possibly across
multiple networks (links).
a. Logical Addressing
b. Routing
a. Logical Addressing
b. Routing
35.
What are the responsibilities of Transport Layer?
The Transport Layer is
responsible for source-to-destination delivery of the entire message.
a. Service-point Addressing
b. Segmentation and reassembly
c. Connection Control
d. Flow Control
e. Error Control
a. Service-point Addressing
b. Segmentation and reassembly
c. Connection Control
d. Flow Control
e. Error Control
36.
What are the responsibilities of Session Layer?
The Session layer is the
network dialog Controller. It establishes, maintains and synchronizes the
interaction between the communicating systems.
a. Dialog control
b. Synchronization
a. Dialog control
b. Synchronization
37.
What are the responsibilities of Presentation Layer?
The Presentation layer is
concerned with the syntax and semantics of the information exchanged between
two systems.
a. Translation
b. Encryption
c. Compression
a. Translation
b. Encryption
c. Compression
38.
What are the responsibilities of Application Layer?
The Application Layer enables
the user, whether human or software, to access the network. It provides user
interfaces and support for services such as e-mail, shared database management
and other types of distributed information services.
a. Network virtual Terminal
b. File transfer, access and Management (FTAM)
c. Mail services
d. Directory Services
a. Network virtual Terminal
b. File transfer, access and Management (FTAM)
c. Mail services
d. Directory Services
39.
What are the two classes of hardware building blocks?
Nodes and Links.
40.
What are the different link types used to build a computer network?
a. Cables
b. Leased Lines
c. Last-Mile Links
d. Wireless Links
b. Leased Lines
c. Last-Mile Links
d. Wireless Links
41.
What are the categories of Transmission media?
a. Guided Media
i. Twisted - Pair cable
1. Shielded TP
2. Unshielded TP
ii. Coaxial Cable
iii. Fiber-optic cable
b. Unguided Media
i. Terrestrial microwave
ii. Satellite Communication
i. Twisted - Pair cable
1. Shielded TP
2. Unshielded TP
ii. Coaxial Cable
iii. Fiber-optic cable
b. Unguided Media
i. Terrestrial microwave
ii. Satellite Communication
42.
What are the types of errors?
a. Single-Bit error
In a single-bit error, only one bit in the data unit has changed
b. Burst Error
A Burst error means that two or more bits in the data have changed.
TO BUY ONLINE STUDY MATERIAL VISIT HERE
In a single-bit error, only one bit in the data unit has changed
b. Burst Error
A Burst error means that two or more bits in the data have changed.
TO BUY ONLINE STUDY MATERIAL VISIT HERE
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