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web.groovymark@gmail.com
- November 24, 2024
Question 01
Which OSI layer is responsible for reliable end-to-end data transmission?
a) Data Link
b) Transport
c) Network
d) Physical
Correct Answer: b) Transport
Explanation: The transport layer ensures reliable end-to-end communication by managing error recovery, data flow control, and data segmentation.
Question 02
What device is used to segment a network and manage traffic between different segments?
a) Hub
b) Switch
c) Router
d) Bridge
Correct Answer: b) Switch
Explanation: A switch segments a network and forwards traffic only to the device that is meant to receive it, reducing network congestion.
Question 03
What is the primary advantage of a star topology?
a) Easy to add or remove devices without affecting the network
b) All devices share a single data path
c) Devices are connected in a loop
d) Each device has a direct connection to all other devices
Correct Answer: a) Easy to add or remove devices without affecting the network
Explanation: In a star topology, each device is connected to a central hub or switch, so adding or removing devices doesn’t disrupt the network.
Question 04
What is the purpose of the Session layer in the OSI model?
a) To encrypt data
b) To handle flow control and error correction
c) To establish, manage, and terminate connections
d) To route data between networks
Correct Answer: c) To establish, manage, and terminate connections
Explanation: The session layer is responsible for setting up, managing, and terminating communication sessions between applications.
Question 05
What protocol is used to resolve domain names into IP addresses?
a) DHCP
b) FTP
c) DNS
d) ICMP
Correct Answer: c) DNS
Explanation: DNS (Domain Name System) translates human-readable domain names into IP addresses, allowing devices to connect to websites and services.
Question 06
Which topology connects each device to two other devices, forming a closed loop?
a) Star
b) Bus
c) Ring
d) Mesh
Correct Answer: c) Ring
Explanation: In a ring topology, each device is connected to two others, creating a circular pathway for signals to travel.
Question 07
What type of encryption uses the same key for both encryption and decryption?
a) Asymmetric encryption
b) Symmetric encryption
c) Hashing
d) Public key encryption
Correct Answer: b) Symmetric encryption
Explanation: Symmetric encryption uses the same key for both encryption and decryption, making it faster but requiring secure key distribution.
Question 08
What is a virtual LAN (VLAN)?
a) A physical separation of networks
b) A logical grouping of devices in different physical locations
c) A type of VPN
d) A network restricted to a single device
Correct Answer: b) A logical grouping of devices in different physical locations
Explanation: A VLAN allows devices to be grouped logically, even if they are not in the same physical location, improving network segmentation and security.
Question 09
Which wireless standard supports the fastest data transmission?
a) 802.11b
b) 802.11g
c) 802.11n
d) 802.11ac
Correct Answer: d) 802.11ac
Explanation: 802.11ac is a high-speed wireless standard that supports faster data transmission compared to earlier standards like 802.11b and 802.11g.
Question 10
Which protocol operates at the Network layer of the OSI model?
a) TCP
b) IP
c) FTP
d) ARP
Correct Answer: b) IP
Explanation: IP (Internet Protocol) operates at the Network layer and is responsible for routing packets across networks.
Question 11
What is the maximum length for a CAT6 Ethernet cable?
a) 10 meters
b) 50 meters
c) 100 meters
d) 150 meters
Correct Answer: c) 100 meters
Explanation: CAT6 Ethernet cables have a maximum length of 100 meters for optimal performance.
Question 12
What is the primary function of a firewall in a network?
a) To monitor bandwidth usage
b) To block unauthorized access
c) To encrypt network traffic
d) To manage IP addresses
Correct Answer: b) To block unauthorized access
Explanation: Firewalls protect networks by filtering and blocking unauthorized access while allowing legitimate traffic.
Question 13
What is the function of a DNS server?
a) To store email messages
b) To assign IP addresses to devices
c) To translate domain names into IP addresses
d) To monitor network traffic
Correct Answer: c) To translate domain names into IP addresses
Explanation: DNS servers map domain names to their respective IP addresses, allowing users to access websites by typing easy-to-remember names.
Question 14
What is the purpose of the Physical layer in the OSI model?
a) To format data for transmission
b) To establish, maintain, and terminate physical connections
c) To handle logical addressing
d) To manage encryption
Correct Answer: b) To establish, maintain, and terminate physical connections
Explanation: The Physical layer deals with the hardware, transmission media, and the physical transmission of data over a network.
Question 15
Which of the following is an example of a connectionless protocol?
a) TCP
b) UDP
c) ICMP
d) FTP
Correct Answer: b) UDP
Explanation: UDP (User Datagram Protocol) is a connectionless protocol, meaning it sends data without establishing a connection, making it faster but less reliable than T
Question 16
What is the function of a MAC address in networking?
a) To provide a unique identifier for a network device
b) To route packets between networks
c) To encrypt data during transmission
d) To authenticate network users
Correct Answer: a) To provide a unique identifier for a network device
Explanation: A MAC (Media Access Control) address is a unique identifier assigned to each network interface card (NIC) for communication on a network.
Question 17
What layer of the OSI model handles data encryption and compression?
a) Application
b) Session
c) Presentation
d) Transport
Correct Answer: c) Presentation
Explanation: The Presentation layer ensures data is properly encrypted, compressed, and formatted for the receiving application.
Question 18
What protocol is used to request an IP address from a DHCP server?
a) HTTP
b) FTP
c) DNS
d) DHCP
Correct Answer: d) DHCP
Explanation: DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses to devices on a network.
Question 19
What device is used to extend the distance a signal can travel in a network?
a) Router
b) Repeater
c) Switch
d) Firewall
Correct Answer: b) Repeater
Explanation: A repeater amplifies and retransmits signals to extend the distance they can travel in a network.
Question 20
Which OSI layer is responsible for routing data between different networks?
a) Data Link
b) Network
c) Session
d) Application
Correct Answer: b) Network
Explanation: The Network layer routes data across networks using logical addressing, such as IP addresses.
