How can a router decide on the output port that should be used to forward a datagram?

In many routers, it is here that the router determines the output port to which an arriving datagram will be forwarded via the switching fabric. The choice of the output port is made using the information contained in the routing table.

What is HOL blocking does it occur in input ports or output ports?

Does it occur in input ports or output ports? HOL blocking – a queued packet in an input queue must wait for transfer through the fabric because it is blocked by another packet at the head of the line. It occurs at the input port. 7.

What is used in a router to transport data from an input port to an output port at incredible speeds?

Gen	Spec	Unofficial name
First	802.11	Wi-Fi 1
Second	802.11b	Wi-Fi 2
Third	802.11a	Wi-Fi 3
Third	802.11g	Wi-Fi 3

What network transfers packets from one input port to an output port based upon the link layer address?

Forwarding: The router-local action of transferring a packet from an input link interface to the appropriate output link interface (within a single router). Terms ‘forwarding’ and ‘switching’ are often used interchangeably. Every router has a forwarding table.

What happens when a router does not know how do you forward a packet to target destination network?

If the router’s forwarding tables know where the packet should go, the router will send the packet out along the appropriate route. If the router does not know where the destination network is, it will forward the packet to its defined gateway, which will repeat the same process.

Where in the router does match plus action happen to determining appropriate output port to which the arriving datagram should be directed?

Where in a router is the destination IP address looked up in a forwarding table to determine the appropriate output port to which the datagram should be directed? At the output port leading to the next hop towards the destination.

How can packet loss occur at input ports?

Answer: Packet loss occurs if the queue size at the input port grows large because of slow switching fabric speed and thus exhausting router’s buffer space. It can be eliminated if the switching fabric speed is at least n times as fast as the input line speed, where n is the number of input ports.

Where does head-of-line blocking occur?

Head-of-line (HoL) blocking occurs if there is a single queue of data packets waiting to be transmitted, and the packet at the head of the queue (line) cannot move forward due to congestion, even if other packets behind this one could.

What is difference between switch and hub?

KEY DIFFERENCES A Hub is a networking device that allows you to connect multiple PCs to a single network, whereas a Switch connects various devices together on a single computer network. A Hub operates on the physical layer, whereas Switch operates on the data link layer.

When data can flow across a cable in both directions this is known as?

Full-duplex data transmission means that data can be transmitted in both directions on a signal carrier at the same time. For example, on a local area network with a technology that has full-duplex transmission, one workstation can be sending data on the line while another workstation is receiving data.

What is packet switching technique?

Packet Switching transmits data across digital networks by breaking it down into blocks or packets for more efficient transfer using various network devices. The network devices can then route the packets to the destination where the receiving device reassembles them for use. …

What is the difference between routing and forwarding?

What Is The Difference Between Routing And Forwarding? Routing is the process by which a network makes a forwarding table. Forwarding, on the other hand, is the actual process of sending a data packet through the network. It uses the forwarding table that the router creates to find its starting point and ending point.