ITPEC FE Morning April 2023 Question 32
In the same subnet, which of the following is the devices that will receive the data when the destination address is set to 255.255.255.255?
Explanation
All devices in the same subnet — 255. is the limited broadcast address.
A packet sent to 255. is delivered to every host on the local network, and routers do not forward it to other networks. It is used when a host does not yet know its own address or the server's, as in a DHCP client's DHCPDISCOVER message.
Answer (a)
Why not others:
- •(b) — which DNS server a device uses plays no part in IP delivery; the reach of a broadcast is set by the subnet boundary.
- •(c) — the default gateway receives a broadcast like any other host on the subnet, but it is not the only receiver and it does not forward the packet.
- •(d) — sending to itself uses the loopback address,
127..0. 0. 1
Key rule: A host part of all 1s is a broadcast address; all 32 bits set is the limited broadcast, delivered to the local subnet and stopped at the router.
Networks · AI-written, may contain errors
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