An implementation of the network layer might offer which of the following services to the transport layer (select all that apply)?Group of answer choicesMultiplexing/demultiplexingGuaranteed DeliverySecurityPacket FramingGuaranteed Delivery with Unbounded DelayIn-order Packet DeliveryLink AccessGuaranteed Delivery with Bounded Delay.
Question
An implementation of the network layer might offer which of the following services to the transport layer (select all that apply)?Group of answer choicesMultiplexing/demultiplexingGuaranteed DeliverySecurityPacket FramingGuaranteed Delivery with Unbounded DelayIn-order Packet DeliveryLink AccessGuaranteed Delivery with Bounded Delay.
Solution
The network layer can offer the following services to the transport layer:
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Multiplexing/demultiplexing: This is the process of combining multiple signals into one signal for transmission over a network, or the reverse process of separating one signal into multiple signals. This is a function that can be provided by the network layer.
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Guaranteed Delivery: The network layer can ensure that packets are delivered to their intended destination. If a packet is lost or damaged, the network layer can retransmit the packet.
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Security: The network layer can provide security services such as encryption and decryption of data, as well as authentication of users and devices.
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In-order Packet Delivery: The network layer can ensure that packets are delivered in the order they were sent. This is important for applications that require data to be received in a specific order.
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Guaranteed Delivery with Bounded Delay: The network layer can ensure that packets are not only delivered, but also delivered within a certain time frame. This is important for real-time applications like video conferencing, where delay can affect the quality of the service.
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Guaranteed Delivery with Unbounded Delay: While this might not be an ideal service, the network layer can still ensure delivery of packets even with an unbounded delay. This means that the delivery of the packet is guaranteed, but the time it takes for the packet to be delivered is not.
Packet Framing and Link Access are typically not services provided by the network layer to the transport layer. Packet Framing is usually a data link layer function, and Link Access is a function of the physical layer.
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