stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Computer networks Basics Flashcards | StudBud
Explore
/
Computer networks Basics
What is Hamming code used for?
What does bandwidth measure?
Computer networks Basics
63 terms
·
StudBud Administration
·
24 plays
Imported from external platform
Flashcards
63 cards
F
Practice quiz
P
Host live
L
Questions
63
Answers
1
What does bandwidth measure?
Frequency range
Signal strength
Data speed
Error rate
2
What is Hamming code used for?
Error correction
Routing
Frequency modulation
Signal transmission
3
Problem: A receiver detects the following CRC remainder when decoding data: 0000. What does this indicate?
No error in transmission
CRC was incorrectly applied
Error in transmission
Data cannot be verified
4
What is the primary function of a network interface card (NIC)?
To enable wired or wireless communication
To act as a modem
To store IP addresses
To provide routing capabilities
5
In which topology is each device connected to two others, forming a closed loop?
Star
Mesh
Ring
Bus
6
Which software is used to encrypt and secure communication over a network?
IDS
VPN
DHCP
Firewall
7
Which network device broadcasts data to all connected devices?
Bridge
Router
Switch
Hub
8
Which layer in the TCP/IP stack corresponds to the OSI model's transport layer?
Transport
Application
Network Access
Internet
9
Which technology uses radio waves for communication?
Wi-Fi
Fiber optic
Bluetooth
Both A and B
10
What is the function of the data link layer?
Encrypts data
Handles error detection and frame transmission
Provides routing
Manages IP addresses
11
RTT: Packet sent in 20 ms, ACK in 20 ms. Total RTT?
20 ms
10 ms
60 ms
40 ms
12
Which wireless technology has the shortest range?
Bluetooth
Wi-Fi
Cellular
Satellite
13
Which protocol is responsible for translating domain names to IP addresses?
DNS
DHCP
FTP
SMTP
14
Which protocol is used for email transmission?
SMTP
DNS
SNMP
FTP
15
Which layer of the TCP/IP model is responsible for applications like email and file transfer?
Application
Transport
Link
Network
16
Which topology uses a single backbone cable for data transmission?
Bus
Mesh
Star
Ring
17
Which topology provides the highest level of redundancy?
Star
Ring
Bus
Mesh
18
Total Latency: Queue = 20 ms, Processing = 5 ms, Transmission = 10 ms. Find total delay.
50 ms
35 ms
25 ms
20 ms
19
TCP Window: Bandwidth = 1 Gbps, RTT = 50 ms. Optimal window size?
5 MB
50 MB
500 KB
50 KB
20
What protocol is used at the Internet layer of the TCP/IP stack?
HTTP
FTP
TCP
IP
21
A network link has a bandwidth of 100 Mbps. How much data can be transmitted in 10 seconds?
125 MB
1 MB
10 MB
1000 MB
22
Which device connects multiple networks and directs data based on IP addresses?
Modem
Router
Switch
Hub
23
How many layers are there in the TCP/IP model?
6
5
7
4
24
What is the primary function of the HTTP protocol?
Secure data transmission
Send emails
Transfer web pages
Manage domain names
25
A network has a one-way delay of 50 ms. What will be the RTT?
25 ms
200 ms
50 ms
100 ms
26
What is the role of DHCP in a network?
Translates domain names
Assigns dynamic IP addresses to devices
Manages file transfers
Provides secure data transmission
27
Which protocol operates at the transport layer of the TCP/IP stack?
HTTP
TCP
IP
FTP
28
A satellite link has a delay of 500 ms and a bandwidth of 100 Mbps. How much data can be in transit at any given time?
50 MB
5 KB
50 KB
5 MB
29
Which protocol is responsible for file transfers?
DHCP
SMTP
FTP
HTTP
30
How many layers are there in the OSI model?
8
6
5
7
31
Which error detection method adds redundant bits to the data?
Checksum
Parity check
CRC
All of the above
32
What does Wi-Fi stand for?
Wireless Fidelity
Wired Fidelity
Wireless Functionality
Wide Frequency
33
Parity Check: Packet = 11010101, odd parity, parity bit = 0. Is there an error?
No
Yes
Depends on the encoding method
Cannot be determined
34
What device operates at the data link layer and connects devices within a single network?
Switch
Modem
Router
Bridge
35
A packet of 1 KB is transmitted over a 10 Mbps link. What is the transmission delay?
0.1 ms
0.8 ms
8 ms
80 ms
36
Which topology connects all devices to a central hub?
Star
Bus
Mesh
Ring
37
Which type of signal is used in analog communication?
Digital
Discrete
Continuous
Binary
38
What is the main unit of data in data communication?
Bit
Packet
Segment
Frame
39
What is the main purpose of the TCP protocol?
Translate domain names
Encrypt data
Manage hardware devices
Provide reliable data transmission
40
Which layer is responsible for data encryption and decryption?
Data Link
Presentation
Physical
Session
41
Which method is commonly used for error detection?
Checksum
CRC (Cyclic Redundancy Check)
Parity check
All of the above
42
Which device amplifies signals to extend the range of a network?
Hub
Router
Gateway
Repeater
43
Which category of software monitors network traffic for suspicious activity?
IDS (Intrusion Detection System)
VPN
Firewall
Antivirus
44
What is the primary function of a network interface card (NIC)?
To store IP addresses
To provide routing capabilities
To enable wired or wireless communication
To act as a modem
45
Checksum: Data: 10101010, 11001100. Sum = 101110110. What is the checksum?
010001000
010001001
None of the above
101110101
46
Problem: Given the dataword 1101 and a generator 101, what is the CRC codeword?
1101110
1101010
1101001
1101101
47
Video Streams: 4K video needs 25 Mbps. Network = 100 Mbps. Max streams?
4
3
2
5
48
What is a major disadvantage of the bus topology?
Requires multiple cables
High cost
Complex setup
Single point of failure
49
Which organization develops networking standards?
ISO
IETF
All of the above
IEEE
50
What does a network operating system (NOS) primarily manage?
Hardware configuration
IP routing only
Network resources and communication
Data storage
51
What is the primary role of the transport layer in the OSI model?
Data segmentation and delivery
Routing
Error detection and correction
File sharing
52
Which network device broadcasts data to all connected devices?
Hub
Router
Bridge
Switch
53
Hamming Code: Error in 1100110, parity bits 1 & 4 wrong. Which bit to correct?
Position 6
Position 5
Position 4
Position 1
54
Hamming Code Error: Data 1010 sent as 1011010. Find error position.
Position 5
Position 1
No error
Position 3
55
If a link has a bandwidth of 10 Mbps and a propagation delay of 200 ms, what is the bandwidth-delay product?
2,000,000 bits
2,000 bits
20,000,000 bits
200,000 bits
56
Which OSI layer establishes, manages, and terminates connections?
Session
Transport
Network
Presentation
57
Download Time: 500 MB file on 50 Mbps link. Minimum time?
80 sec
40 sec
100 sec
10 sec
58
A TCP segment has an RTT of 200 ms. If the sender retransmits a lost packet, how much additional delay is introduced?
100 ms
400 ms
600 ms
200 ms
59
Propagation Delay: Speed = 2×1082×10^82×108 m/s, Distance = 3000 km. Find delay.
10 ms
20 ms
5 ms
15 ms
60
Which device amplifies signals to extend the range of a network?
Gateway
Repeater
Hub
Router
61
What device operates at the data link layer and connects devices within a single network?
Router
Switch
Modem
Bridge
62
Which device connects multiple networks and directs data based on IP addresses?
Modem
Router
Hub
Switch
63
Problem: A sender transmits the binary data 1010110 with an even parity scheme. What should the parity bit be?
Cannot be determined
Either 0 or 1
1
0
