Correct Answer - Option 1 : a single
The router table contains addresses belonging to a single protocol
There are two kinds of routing protocols:
- Distance vector
- Link state
Routing tables are used to find out the next hop addresses and destination addresses.
A routing table is a set of rules, often viewed in table format, that is used to determine where data packets traveling over an Internet Protocol (IP) network will be directed. All IP-enabled devices, including routers and switches, use routing tables.
The entry corresponding to the default gateway configuration is a network destination of 0.0.0.0 with a network mask (netmask) of 0.0.0.0. The Subnet Mask of default route is always 255.255.255.255 .
A routing table contains the information necessary to forward a packet along the best path toward its destination.
Each entry in the routing table consists of the following entries:
Network ID: The network ID or destination corresponding to the route.
Subnet Mask: The mask that is used to match a destination IP address to the network ID.
Next Hop: The IP address to which the packet is forwarded
Outgoing Interface: Outgoing interface the packet should go out to reach the destination network.
Metric: A common use of the metric is to indicate the minimum number of hops (routers crossed) to the network ID.