• Question To Ask For Reference Check
• 20 Questions To Ask
• List Of Questions To Ask
• Great Questions To Ask

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Question To Ask For Reference Check

In the usual networks, since every host has a unique IP address recognised among the stations in the network, why is a MAC address still necessary? Suppose a station A wants to send to Station B.

20 Questions To Ask

Station A knows Station B's IP address. But Station A would still send out an ARP to request for B's MAC address before sending. And then after having B's MAC address, A would then send the data with B's MAC address as destination address. Why can't B just accept the packet just like how it respond to the ARP sent out by A? Then this way, station A wouldn't have to send out an ARP to ask for the MAC address and this would also remove the need for having a MAC address. Moreover, the IP addresses are unique among the network stations, why need another MAC address to recognise the stations? XEnOn, this is the fourth question you've asked which is all part of understanding how networks work on a fundamental level.

List Of Questions To Ask

You need to gain an understanding of the OSI model and where different things fit in, for a start. Personally, I'd suggest starting to read through some CCNA documentation - although it's a vendor specific qualification, the theory is applicable across the board. I appreciate this board is a Q&A board, but you're not going to be able to get a handle on all of this by just asking one off questions. – Nov 16 '11 at 11:13 •.

Great Questions To Ask

Firstly, may I endorse Dan's answer; proper research into the subject is much better than asking questions each of which shines but one individual light into the darkness. I'd recommend, which is the networking bible; my copy of Vol. 1 is pretty much broken at the spine from over-use. But since you asked the question, and I'd typed half an answer when Dan's came up, let me press 'Post anyway', with my Old Admins hat on. Partly, it's historical. MAC addresses are a layer-2 thing, while IP addresses are layer-3 (see, eg, for more detail on the layers). Why this separation?