Review Questions

You can find the answers to the review questions in Appendix B.

1. The OSI model has seven layers and the DoD has four. At which layer does SMTP work in both models?

   1. Network
   2. Transport
   3. Session
   4. Application
   5. Internet

2. You need to have secure communications using HTTPS. What port number is used by default?

   1. 69
   2. 23
   3. 21
   4. 443

3. You want to implement a mechanism that automates the IP configuration, including IP address, subnet mask, default gateway, and DNS information. Which protocol will you use to accomplish this?

   1. SMTP
   2. SNMP
   3. DHCP
   4. ARP

4. What protocol is used to find the hardware address of a local device?

   1. RARP
   2. ARP
   3. IP
   4. ICMP
   5. BootP

5. You need to log in to a Unix server across a network that is not secure. Which of the following protocols will allow you to remotely administer this server securely?

   1. Telnet
   2. SSH
   3. SFTP
   4. HTTP

6. If you can ping by IP address but not by hostname, or FQDN, which of the following port numbers is related to the server process that is involved?

   1. 21...