Table of Contents
- 1 What happens when router receives a packet that does not match any routes?
- 2 Which action will be taken by a router if a route to the destination is not found in the routing table?
- 3 What are the 3 ways that a router can learn routes?
- 4 What happens when a router receives a packet?
- 5 Which two functions are primary functions of a router?
- 6 How do routers decide which route to use?
- 7 Which protocol is used by routers to forward messages?
- 8 How does a router learn routes?
- 9 How does a router determine the best path?
- 10 What are the entries in the routing table?
What happens when router receives a packet that does not match any routes?
(if a packet does not match any route in a routing table, the router drops the packet. In this example, the router does not know about the destination network, and it is not configured with a default route. With a default route, the router will forward the packet to the next hop router specified by the default route.)
Which action will be taken by a router if a route to the destination is not found in the routing table?
Default Routes If the destination address of a packet does not match any entry in the routing table, the packet is sent through a default route. If no default route exists and the destination address of the packet does not match any entry in the routing table, the packet is discarded.
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.
What are the 3 ways that a router can learn routes?
There are three ways for a router to learn routes:
- Static Routing – This is the method by which an administrator manually adds routes to the routing table of a router.
- Default Routing – This is the method where all routers are configured to send all packets towards a single router.
What happens when a router receives a packet?
When a router receives a packet, the router checks its routing table to determine if the destination address is for a system on one of it’s attached networks or if the message must be forwarded through another router. It then sends the message to the next system in the path to the destination.
What three processes does a router execute when it receives a packet from one network that is destined for another network?
Load balancing occurs when a router sends the same packet to different destination networks. Load balancing occurs when a router sends the same packet to different destination networks. Load balancing allows a router to forward packets over multiple paths to the same destination network.
Which two functions are primary functions of a router?
Applications
- Access, core and distribution.
- Security.
- Routing different networks.
- Internet connectivity and internal use.
How do routers decide which route to use?
A primary function of a router is to determine the best path to use to send packets. To determine the best path, the router searches its routing table for a network address that matches the destination IP address of the packet.
How and when are other routers involved in the internal forwarding decisions and actions of a router when it processes an individual packet switching )?
How and when are other routers involved in the internal forwarding decisions and actions of a router when it processes an individual packet (switching)? When a packet leaves the current router it will either be delivered to a directly connected destination or handed on to another router.
Which protocol is used by routers to forward messages?
A router’s main function is to forward traffic to destination networks via the destination address in an IP packet. Routers also resolve MAC addresses (particularly their own) by using the Address Resolution Protocol (ARP).
How does a router learn routes?
A router learns about networks that can be reached from its interface thanks to the switches, which themselves learn what computers are connected to each port. And once it learns, it uses the network layer to determine the best route to a destination by using IP.
When does a router look at the routing table?
When a router receives a packet that needs to be forwarded to a host on another network, it examines its destination IP address and looks for the routing information stored in the routing table. Each entry in the routing table consists of the following entries:
How does a router determine the best path?
A primary function of a router is to determine the best path to use to send packets. To determine the best path, the router searches its routing table for a network address that matches the destination IP address of the packet. The routing table search results in one of three path determinations:
What are the entries in the routing table?
Each entry in the routing table consists of the following entries: the network and the subnet mask – specifies a range of IP addresses. the remote router – the IP address of the router used to reach that network. the outgoing interface – the outgoing interface the packet should go out to reach the destination network.
How are directly connected networks added to a routing table?
There methods are used to populate a routing table: directly connected networks are added automatically using static routing using dynamic routing