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WorksheetsComputer Networks
Total questions: 20
Worksheet time: 4mins
Which layer of the OSI model is responsible for reliable data transfer between devices?
Network Layer
Transport Layer
Session Layer
Data Link Layer
Which protocol is used to resolve an IP address to a MAC address?
DNS
DHCP
ARP
ICMP
What is the main advantage of using IPv6 over IPv4?
Lower latency
Simpler routing protocols
Larger address space
Faster transmission speed
Which of the following protocols uses a three-way handshake to establish a connection?
UDP
ICMP
TCP
ARP
Which of the following best describes DNS?
Maps MAC addresses to IP addresses
Translates domain names into IP addresses
Routes packets between networks
Detects collisions on a network
What is the function of NAT (Network Address Translation)?
Encrypts all traffic on a network
Translates private IP addresses into public IP addresses
Connects networks using different topologies
Prevents routing loops
Which of the following protocols is connectionless?
TCP
UDP
HTTP
FTP
Which of the following describes CIDR notation correctly?
A system to detect routing loops
A way to represent IP addresses and subnet masks efficiently
A type of packet-filtering firewall
A routing algorithm
Which method helps to avoid data collision in wireless networks?
CSMA/CD
Token Ring
CSMA/CA
ARP
Which of the following is a device that operates at Layer 2 of the OSI model?
Router
Hub
Switch
Gateway
In BGP (Border Gateway Protocol), which attribute is used to determine the best path when multiple routes exist to the same destination?
AS-PATH
MED
LOCAL_PREF
NEXT_HOP
In TCP congestion control, what happens during the 'fast recovery' phase?
The congestion window is reset to one segment.
The congestion window is reduced by half, and transmission continues with fast retransmission.
TCP waits for a timeout before resending lost packets.
The receiver sends duplicate ACKs for each missing segment.
Which of the following accurately describes the function of an MPLS (Multiprotocol Label Switching) network?
It uses IP addresses for all routing decisions.
It assigns labels to packets to enable faster routing through predetermined paths.
It encrypts packets at the transport layer.
It is used only for wireless communication.
In IPv6, what is the main purpose of the 'Flow Label' field in the header?
To define the next hop for routing decisions.
To uniquely identify packets belonging to the same flow for QoS handling.
Which statement about TCP and UDP checksum calculations is correct?
Both use only data payload for checksum computation.
TCP includes a pseudo-header in its checksum, but UDP does not.
Both include a pseudo-header derived from IP header fields.
UDP checksum is optional in IPv6 but mandatory in IPv4.
The OSI model has (a) layers.
The process of dividing a large network into smaller subnetworks is called (a)
A (a) firewall keeps track of active connections and makes decisions based on the context of traffic.
When you type a URL in a browser, the first step is usually a (a) lookup to find the IP address of the domain.
A (a) is used to establish a secure encrypted tunnel over an untrusted network.
