The physical address of your router, often referred to as the MAC (Media Access Control) address, can typically be found on a label on the back or bottom of the device. It is usually a series of six pairs of alphanumeric characters, separated by colons or hyphens (e.g., 00:1A:2B:3C:4D:5E). You can also find it in the router's web interface under the network settings.
** The router modifies the TTL field, decrementing it by one.** The router maintains the same source and destination IP.** The router changes the source physical address to the physical address of the exit interface
the router is assigned an ip address.
IP address remains the same. Mac address changes from router to router.
The router ID is used to uniquely identify each router in the OSPF routing domain.If no loopback interfaces are configured, the router chooses the highest active IP address of any of its physical interfaces.
The Router only has one M.A.C Address and One IP Address But, the Router can have many Connections ( Devices using the network ) That may shoe up as their IP Addresses. But the Router only Has One IP Address
Because your router has a unique IP address (usually it's the case), your IP address can be traced back to the physical address (town, street, house, apartment), if you are registered as a resident at your current address people with certain skills will track you down for couple minutes.
in general the router uses the network address to compare to the routing table. Specifically, on the internet, the Router looks up the destination IP address in the router table to determine where to route the packet.
Hot standby router protocol. 2 different routers will have 2 different physical addresses, but you can give both of them a shared virtual address. only 1 router will answer on the virtual address at a time, but one goes down the other will take over.
The "default gateway" is your router.
the highest IP address of any logical interfacethe highest IP address of any physical interface
A very intelligent question... Actually it is possible if you have an backdoor access to the switch or router of your ISP. If you know what I mean. But in general terms, it is NO!
If a switch is connected to a router then the MAC address of the router is known to the switch through that port. A host takes advantage of this by using the default gateway address (the address of the router) which the switch "knows" by its lookup table. Therefore, the switch can learn the address automatically and no configuration is necessary.