Compnet 3

What is the primary purpose of the Data Link Layer in the OSI model?

• To provide end-to-end communication between devices across different networks

• To provide and manage data for transmission over the physical network and ensure reliable communication between devices on the same network segment

• To route data packets to their destination across different networks

• To manage the application layer processes and provide user interface support

Which of the following is a key function of the Data Link Layer in the OSI model?

• It provides end-to-end communication across different networks by routing data packets

• It encapsulates data with a header and a trailer to create a frame ad performs NIC-to-NIC communications within the same network

• It establishes a user interface for communication between applications on different devices

• It manages network traffic and allocates IP addresses for data transfer

Which of the following statements best describes the role of the Data Link Layer in multi-access networks?

• The Data Link Layer governs how devices share the physical media in multi-access networks using contention-based or controlled access methods

• The Data Link layer only supports full-duplex communication and does not handle half-duplex

• The Data Link Layer manages logical topologies and physical addressing across multiple network layers

• The Data Link Layer is responsible for creating and maintaining physical connection between nodes in a multi-access network

Which statement correctly describes data transmission at the transport layer?

• Retransmission of lost packets is provided by both TCP and UDP

• Segmentation is provided by the window size field when the TCP protocol is used

• A single datagram can include both a TCP an a UDP header

• Both UDP and TCP use port numbers

What is a characteristic of the UDP protocol?

• Low overhead

• Guaranteed delivery

• Error correction

• End-to-end establishment before delivery

What is the main function of the Data Link Layer in the OSI model?

• Routing packets across networks

• Error detection and correction

• Encrypting data

• Managing user permission

Which protocol is commonly used at the Data Link Layer to handle collisions in a network?

• HTTP

• TCP

• CSMA/CD

• UDP

In which layer of the OSI model does the IP protocol operate?

• Physical Layer

• Data Link Layer

• Network Layer

• Transport Layer

What type of address is used at the Data Link Layer to identify devices on a network?

• IP address

• Port address

• MAC address

• Hostname

Which of the following protocols is NOT typically associated with the Network Layer?

• IP

• ICMP

• ARP

• FTP