ITPEC FE Morning April 2018 Question 31
Which of the following TCP/IP protocols is used to assign IP addresses dynamically?
Explanation
DHCP — a server leases each client an IP address, together with settings such as the subnet mask, default gateway and DNS server.
When a device joins the network it broadcasts a request, and the DHCP server answers with an address from its pool, valid for a lease period. Addresses no longer in use return to the pool, so no one has to configure each host by hand.
Answer (b)
Why not others:
- •(a) ARP — finds the MAC address that belongs to a known IP address on the local network; it does not assign addresses
- •(c) RIP — a distance-vector routing protocol that routers use to exchange routes, counted in hops
- •(d) SMTP — transfers email from clients to mail servers and between mail servers
Key rule: Match the protocol to its job: DHCP assigns addresses, ARP resolves IP to MAC, RIP exchanges routes, SMTP sends mail.
Networks · AI-written, may contain errors
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