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GK One-Line Question & Answer

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Computer Networks → Introduction to Computer Networks 2

The_________ layer is responsible for the delivery of a message from one process to another.
transport
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The frequency of the modulated signal is constant for the duration of one signal element, but changes for the next signal element if the data element changes. Both peak amplitude and phase remain constant for all signal elements. This is
FSK
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Computer Networks → Types of Networks 2

The Internetworking Protocol (IP) is a ________ protocol.
none of the above
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QAM combines
ASK and PSK
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Computer Networks → Network Topologies 2

_______ is a process-to-process protocol that adds only port addresses, checksum error control, and length information to the data from the upper layer.
UDP
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Differential Manchester and multi line transmission (MLT-3) schemes differ in
Both a and b
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Computer Networks → OSI Reference Model 2

__________ provides full transport layer services to applications.
TCP
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OSI model defines an open system as
a set of protocols that allows any two different systems to communicate
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Computer Networks → TCP/IP Model 2

The ________ address, also known as the link address, is the address of a node as defined by its LAN or WAN.
physical
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1 TeraHertz =
1000000000000 Hz
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Computer Networks → Physical Layer 2

Ethernet uses a ______ physical address that is imprinted on the network interface card (NIC).
6-byte
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Shannon capacity formula for noisy channel is
C = B Log (1 + SNR)
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Computer Networks → Data Link Layer 2

Which layer links the network support layers and user support layers
transport layer
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In sliding window, if the window size is 63, what is the range of sequence numbers?
0 to 63
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Computer Networks → Network Layer 2

Which address is used in an internet employing the TCP/IP protocols?
all of the mentioned
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Regulation of the rate of transmission of data frames is known as
Data rate control
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Computer Networks → Transport Layer 2

Which address identifies a process on a host?
port address
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When a primary device wants to send data to a secondary device, it needs to first send _______ frame.
ENQ
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Computer Networks → Session Layer 2

Transmission data rate is decided by
physical layer
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Flow control is needed to prevent
Overflow of receiver buffer
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Computer Networks → Presentation Layer 2

Physical layer provides
all of the mentioned
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A timer is set when _____________is sent.
Packet
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Computer Networks → Application Layer 2

The physical layer translates logical communication requests from the ______ into hardware specific operations.
data link layer
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In a Go-Back-N ARQ, if the window size is 63, what is the range of sequence numbers?
0 to 63
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Computer Networks → IP Addressing 2

A single channel is shared by multiple signals by
multiplexing
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In Go-Back-N ARQ, if frames 4, 5, and 6 are received successfully, the receiver may send an ACK _______ to the sender.
7
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Computer Networks → Subnetting 2

Wireless transmission can be done via
all of the mentioned
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ARQ stands for _______.
Automatic repeat request
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Computer Networks → Routing Algorithms 2

In asynchronous serial communication the physical layer provides
both (a) and (b)
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For Stop-and-Wait ARQ, for 10 data packets sent, _______ acknowledgments are needed.
exactly 10
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Computer Networks → Switching Techniques 2

The physical layer is responsible for
all of the mentioned
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HDLC is an acronym for _______.
High-level data link control
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Computer Networks → DNS 2

Attenuation means
loss of energy
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Data link control deals with the design and procedures for ______ communication.
node-to-node
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Computer Networks → HTTP and HTTPS 2

If r is the number of data elements carried per signal element, N is the data rate, and S is the signal rate, then
S = N/r
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_______ in the data link layer separates a message from one source to a destination, or from other messages going from other sources to other destinations.
Framing
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Computer Networks → FTP and SMTP 2

NRZ L and NRZ I differ in
Both a and b
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In _______ framing, there is no need for defining the boundaries of frames.
fixed-size
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Computer Networks → Wireless Networks 2

Analog to digital conversion can be done using
Both a and b
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In ________ framing, we need a delimiter (flag) to define the boundary of two frames.
variable-size
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