Which layer of the OSI model is responsible for the physical transmission of data across a network medium?
A Network
B Physical
C Data Link
D Transport
The Physical layer (Layer 1) is responsible for the actual transmission of raw data across the physical medium, such as cables or radio waves, converting digital data into signals that can be transmitted.
Which of the following is a unique identifier assigned to each network interface on a local network, operating at the Data Link layer?
A MAC address
B IP address
C DNS name
D Port number
A MAC (Media Access Control) address is a unique identifier assigned to network interfaces for communication at the Data Link layer. It ensures that data is properly delivered to the correct device on a local network.
Which switching technique involves establishing a dedicated communication path between two devices for the duration of the transmission?
A Message Switching
B Virtual Circuit Switching
C Packet Switching
D Circuit Switching
In circuit switching, a dedicated communication path is established between two devices for the entire duration of the communication. It guarantees a continuous, real time connection, typically used in traditional telephone networks.
Which of the following is a method of routing that divides large data into smaller packets, which are then transmitted independently across the network?
A Broadcast Switching
B Circuit Switching
C Packet Switching
D Message Switching
Packet switching divides data into smaller packets, which are sent independently across the network. This method allows for efficient data transmission and is used in most modern networks, including the internet.
Which protocol operates at the Data Link layer and is used to control access to the network medium?
A Ethernet
B IP
C ARP
D TCP
Ethernet is a protocol that operates at the Data Link layer and defines how devices in a local area network (LAN) access and share the network medium. It uses MAC addresses to ensure proper communication between devices.
Which of the following best describes the function of the Data Link layer in the OSI model?
A Data encryption
B Routing data packets
C Ensuring reliable communication
D Physical address assignment
The Data Link layer ensures reliable communication by providing error detection and correction. It breaks data into frames, adds MAC addresses, and ensures that the data is properly transmitted between devices on a local network.
Which of the following is a common method used to ensure data is properly delivered to the correct device in a local network?
A DNS
B MAC address
C IP address
D Port number
A MAC address uniquely identifies each device on a local network. It is used by the Data Link layer to ensure that data is properly delivered to the intended device on the network.
What is the main advantage of packet switching over circuit switching?
A Higher security
B Faster transmission
C Dedicated connection
D More efficient resource usage
Packet switching allows data to be sent in smaller packets across the network, which can travel via different routes. This increases efficiency and reduces the need for dedicated connections, making it ideal for modern networks like the internet.
Which of the following is the primary function of a router in a network?
A Encrypt traffic
B Forward data frames
C Route data packets
D Assign IP addresses
A router is responsible for routing data packets between different networks. It examines the destination IP address and determines the best path for the packet to travel across interconnected networks.
Which of the following technologies allows data to be transmitted wirelessly between devices within a short range?
A Bluetooth
B 5G
C Wi Fi
D Ethernet
Bluetooth is a wireless technology that allows devices to communicate over short distances, typically up to 100 meters. It is commonly used for connecting peripherals like headsets, keyboards, and mice to mobile devices or computers.
Which type of switching is used in modern internet communication, where data is divided into packets and sent over the best available path?
A Virtual Circuit Switching
B Circuit Switching
C Packet Switching
D Message Switching
Packet switching is used in modern internet communication, where data is divided into small packets that are sent independently through various routes in the network. This enables efficient use of network resources and supports high data throughput.
Which of the following protocols is used for resolving MAC addresses to IP addresses in a local network?
A DHCP
B ARP
C ICMP
D DNS
ARP (Address Resolution Protocol) is used to map an IP address to its corresponding MAC address on a local network. It allows devices to communicate with each other by ensuring data packets are sent to the correct hardware address.
Which of the following protocols is responsible for ensuring reliable data delivery between devices across a network?
A DNS
B IP
C TCP
D UDP
TCP (Transmission Control Protocol) ensures reliable data delivery by establishing a connection between sender and receiver, managing flow control, error checking, and retransmitting lost packets. It ensures that data is delivered in the correct order.
Which of the following is a common method used to prevent network collisions in a shared medium like Ethernet?
A NAT
B DHCP
C ARP
D CSMA/CD
CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is a protocol used in Ethernet networks to prevent and manage collisions when multiple devices try to transmit data simultaneously over a shared medium.
What is the main function of the OSI Data Link layer?
A Error detection and correction
B Encryption
C Physical addressing
D Routing packets
The Data Link layer is responsible for ensuring the reliable transmission of data frames between devices. It handles error detection and correction to ensure that data is correctly transmitted and received without errors.