Twelve questions covering the whole course. Answer each one, then read the explanation. If you get a question wrong, go back to the lesson it came from.
1. A web server answers a request with status code 503. What does that tell you?
2. A monitoring script wants to check a page's headers without downloading the page itself. Which HTTP method should it use?
3. What does a certificate signed by a certificate authority (CA) add to an HTTPS connection?
4. A firewall must allow users to reach a secure website. Which port does HTTPS use by default?
5. Why should you use SSH instead of Telnet to manage a router?
6. You want the router to accept SSH but refuse Telnet on its VTY lines. Which line command does this?
7. A router copies its configuration to a server over UDP, without any username or password. Which protocol is it using?
8. In FTP passive mode, who opens the data connection?
9. Your phone and laptop must show the same mail folders. Which protocol should they use to read the mail?
10. A device is synced to a stratum 2 server. What is its own stratum?
11. A router is configured with logging trap notifications (level 5). Does a level 6 message reach the Syslog server?
12. A network management station (NMS) must receive SNMP traps from routers. Which port must be open on the NMS?