Which of the following descriptions about DHCP is incorrect?

Question

Options

• AThe message interaction experienced by DHCP to obtain an address normally includes Discover,
• BMultiple DHCP servers are not allowed in the network at the same time, because multiple servers
• CIf the client abandons the current IP address, she uses a DHCP RELEASE message to notify the
• DThe Discover message between the DHCP Relay and the DHCP server is a unicast message

• A
  3% (1)
• B
  71% (25)
• C
  17% (6)
• D
  9% (3)

Explanation

Option B is the incorrect statement because multiple DHCP servers can absolutely coexist in the same network. This is actually a common and recommended practice for redundancy and load balancing - clients simply accept the first DHCP offer they receive, and servers that do not get a Request message will naturally reclaim their tentative address allocation.

Option A is correct: the standard DHCP address acquisition follows the four-step DORA sequence - Discover, Offer, Request, Acknowledge - so this accurately describes the process.

Option C is correct: a client that wishes to relinquish its lease before expiry sends a DHCPRELEASE message to the server, allowing the server to return that address to the available pool immediately.

Option D is correct: when a DHCP Relay Agent forwards a client's broadcast Discover message onward, it sends it as a unicast packet directly to the known DHCP server IP address, since the relay operates at Layer 3 and knows the server's address.

Memory tip: Think of DHCP servers like multiple cashiers at a checkout - having more than one does not break the system, it just means whoever serves you first wins. If B ever claims "only one server allowed," that is the flag it is wrong.

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