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Which portion of the packet does a router use to forward the packet to the destination?
The Destination Address (Layer 2 or Layer 3)
Receives a packet that is destined for 192.168.1.4 How will router treat the packet?
the router will enqueue the packet that is sent to the destination 192.168.1.4.and then that packet is sent on transmission media(cable).it checks every ip address that is holding the ip same as the destination ,if it reaches there then it deleiver it on that machine.
When the destination network is not listed in the routing table of a cisco router what are two possible options the router might take?
The router discards the packet. The router forwards the packet via the default route
When forwarding a packet which route will the packet select?
First, routing is the process a router performs when making forwarding decisions for each packet arriving at the gateway interface. To forward a packet to a destination network, the router requires a route to that network. If a route to a destination network does not exist on the router, the packet will be forwarded to the default gateway. Now, the destination network can be a number of routers or hops away from the default gateway. If the router has an entry for the network in its routing table, it would only indicate the next-hop router to which the packet is to be forwarded to and not the exact route to the final router. To sum it up, the routing process uses a routing table to map the destination address to the next hop and then forwards the packet to the next-hop address.
What address is used to send packets that are destined for an outside network?
Router uses IP address of destination node to do the direct packet switching..while bridge & switch uses the MAC address to packet forwarding.
When forwarding a route which route will router select?
First, routing is the process a router performs when making forwarding decisions for each packet arriving at the gateway interface. To forward a packet to a destination network, the router requires a route to that network. If a route to a destination network does not exist on the router, the packet will be forwarded to the default gateway. Now, the destination network can be a number of routers or hops away from the default gateway. If the router has an entry for the network in its routing table, it would only indicate the next-hop router to which the packet is to be forwarded to and not the exact route to the final router. To sum it up, the routing process uses a routing table to map the destination address to the next hop and then forwards the packet to the next-hop address.
What are true statements about routes and their use?
--> If the destination network is directly connected, the router forwards the packet to the destination host. --> If no route exists for the destination network and a default route is present, the packet is forwarded to the next-hop router. --> If the originating host has a default gateway configured, the packet for a remote network can be forwarded using that route.
Firewall is a router that examines the header of every packet of data it receives to determine whether that type of packet is authorized to continue to its destination?
packet-filtering
How do you deny access to Facebook in my router?
Since Facebook uses a limited range of IP addresses, blocking those addresses on the router will effectively deny access to Facebook.
Which operation is used by a router to extract the destination network address from the destination IP address of a packet?
Route table lookup
In an IPv4 environment what information is used by the router to forward data packets from one interface of a router to another?
It uses the MAC address, Media Access Control. Every packet sent from a computer contains its MAC address. The router stores this in its routing table. When it receives a packet with a destiation address of that MAC address, then it forwards it to that computer. This is called NAT, Network Address Translation. It uses the Destination IP address
Which two statements describe features of an IPv4 routing table on a router?
An IPv4 routing table on a router typically contains entries that include destination IP addresses, subnet masks, and next-hop addresses, which guide the router in forwarding packets to their intended destinations. Additionally, the table may include metrics that indicate the cost of reaching a destination, helping the router to select the most efficient path. Each entry can also specify the interface through which the packet should be sent.
