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A port number is linked to an IP address to create a unique identification number for each process being run by a client. Port numbers do not have to be unique, but IP addresses do.
Port and memory addresses are expressed as Hexadecimal Numbers
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unique addresses that are public domain addresses
Not possible, both are numbers.
Addresses 80 - 87H are assigned to the P0 port
yes each and every device in a network will have unique mac address.
MAC address are hard coded on network cards and network devices. A HUB acts as a splitter, so yes. >both Mac addresses are provisioned; Implies your ISP will assign unique IP addresses. The hub then acts as only an electrical connection box. Without Unique IP addresses, you need a router instead of a hub or switch
The same reason your house address is unique. To address mail to a specific destination.
An IP address must be unique within a LAN; the combination of the network and host portion must present a number that is not duplicated anywhere else in the network. Outside of a LAN the IP addresses do not have to be unique, except that the network id portion can only be used by the organization that owns the IP network address. The host portion does not need to be unique across all LANs within an enterprise network.
Public IP addresses must be unique across the entire Internet.
It is usually bound to a port and address on the local machine and waits for incoming requests. It listens to all addresses on the machine by default although it may need to be told what ports and addresses it specifically needs to listen to.