6.7. Answers to Review Questions

  1. D. SMTP resides at the Application layer of the OSI/DoD model.

  2. D. HTTPS, or Secure HTTP uses port 443 by default.

  3. C. Dynamic Host Configuration Protocol (DHCP) is used to provide IP information to hosts on your network. DHCP can provide a lot of information, but the most common is IP address, subnet mask, default gateway, and DNS information.

  4. B. Address Resolution Protocol (ARP) is used to find the hardware address from a known IP address.

  5. B. Secure Shell (SSH) allows you to remotely administer router, switches and even servers securely.

  6. C. The problem is with DNS, which uses both TCP and UDP port 53.

  7. A, B. A client that sends out a DHCP Discover message in order to receive an IP address sends out a broadcast at both ...

Get CompTIA Network+® Study Guide now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial