CompTIA Server+ Exam: SK0-004 Practice Questions

Clients cannot connect to the network. A technician determines that port 68 is not open. Which protocol is being blocked?

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Question

Clients cannot connect to the network.

A technician determines that port 68 is not open.

Which of the following protocols is being blocked?

Answers

Explanations

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A. B. C. D.

D.

The protocol that uses port 68 is DHCP (Dynamic Host Configuration Protocol). DHCP is responsible for assigning IP addresses, subnet masks, default gateways, and other network configuration information to client devices automatically. If port 68 is not open, clients will not be able to obtain an IP address from the DHCP server, which will result in them being unable to connect to the network.

Option A (POP3) is incorrect because it uses port 110 and is responsible for email retrieval.

Option B (DNS) is incorrect because it uses port 53 and is responsible for resolving domain names to IP addresses.

Option C (LDAP) is incorrect because it uses port 389 and is responsible for managing directory services.

Therefore, the correct answer is option D (DHCP), as it uses port 68 and is responsible for assigning IP addresses and network configuration information to clients.