What are two functions provided by the network layer?

What are two functions provided by the network layer?

• A. Routing data packets and managing switch traffic
• B. Directing data packets to destination hosts on other networks and providing end devices with a unique network identifier
• C. Maintaining session states and facilitating application communication
• D. Encrypting passwords and configuring VLANs

Answer: (B)

The network layer is primarily responsible for the movement of packets across a network and for facilitating communication between devices on different networks. One of its key functions is directing data packets to destination hosts, which involves making decisions about the best path through the network for these packets to travel. This requires routing protocols that determine the most efficient paths based on the current network topology. Additionally, the network layer assigns unique network identifiers to end devices, which typically takes the form of IP addresses. These addresses enable the network to differentiate between devices and direct traffic accurately across interconnected networks. With this capability, devices can effectively communicate, even if they are on separate networks. The other options highlight functions that relate to different layers of the OSI model or are tasks not typically associated with the network layer. For instance, managing switch traffic is more aligned with the data link layer, while maintaining session states and facilitating application communication pertains to the session and application layers. Similarly, encrypting passwords and configuring VLANs are administrative tasks mostly related to security and data link layer configurations, respectively.

The network layer is primarily responsible for the movement of packets across a network and for facilitating communication between devices on different networks. One of its key functions is directing data packets to destination hosts, which involves making decisions about the best path through the network for these packets to travel. This requires routing protocols that determine the most efficient paths based on the current network topology.

Additionally, the network layer assigns unique network identifiers to end devices, which typically takes the form of IP addresses. These addresses enable the network to differentiate between devices and direct traffic accurately across interconnected networks. With this capability, devices can effectively communicate, even if they are on separate networks.

The other options highlight functions that relate to different layers of the OSI model or are tasks not typically associated with the network layer. For instance, managing switch traffic is more aligned with the data link layer, while maintaining session states and facilitating application communication pertains to the session and application layers. Similarly, encrypting passwords and configuring VLANs are administrative tasks mostly related to security and data link layer configurations, respectively.