Byfrank824
If I only have one computer and the route is connected to an interface in this network, why do I need a broadcast address? You computer with the IP address, please provide your MAC address. I don't need a broadcast, since only the router and the computer are in the network.
(1 votes)
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because this is what the RFC standard specifies.
It would be too complicated to adapt the standard for such special cases. And it doesn’t hurt
Thank you, but my thought was okay??
This is how TCP/IP works. Certain sequences for ARP, DNS and DHCP etc have been so steady (RFC has already been mentioned here).
And how should the devices know if they can’t ask?
On the other hand, if only two devices exist in the network and nothing is to change about it -> Why don’t you adjust the subnet mask so that the network is correspondingly small. Then you will still have a broadcast and multicast address, but there are not regular requests sent to the network to find new devices…. the addresses are all already occupied.
The frequency of inquiries remains the same no matter how the subnet mask looks. Does PC1 need the MAC broadcast from the router PC1 an ARP request, whether zb /24 mask or /30 mask is no matter. And as long as no VLANs are configured on a switch to separate the network on Layer 2, the broadcast also reaches other computers from other subnetworks, as the switch, besides the source mac, only sees the destination Mac of an Ethernet frame and a broadcast (dest ffff.ffff.ffffff.ffffff) on all ports forwarded (up to the source port).
other subnetworks would have to hang on the same switch, rather unusual, but you would be right