Well Known Port Numbers

15 Points Per Correct Answer - No time limit  

1. The most basic one of them all. You open your web browser and enter "http://www.funtrivia.com" at its address bar. With which port on the FunTrivia web server are you establishing connection? Answer: (Two digits)

2. You activate the network link on your home PC. In most cases, the link is configured to obtain an IP address from your ISP (Internet Service Provider). When activated, your network link broadcasts a message on port 67. Which protocol does it use? RPC DHCP ARP RARP

3. Your friend has sent you a link for photos from his latest trip to Israel, which he put on a public FTP site, ftp://ftp.publicftp.com. You have downloaded the photos and enjoyed the wonderful scenery and atmosphere. With which port(s) of the FTP server has your PC interacted when obtaining the data? Only 20 None, FTP does not use ports Only 21 21 and 20 or 21 and a random port

4. When browsing to FunTrivia, you are using a service which translates the name "www.funtrivia.com" to the IP address of the FunTrivia web server. This service uses port 53 (TCP or UDP). What is the name of the service in question? Answer: (A TLA (three letter acronym))

5. Oops, the FunTrivia website is not responding and you just don't know what happened to it. Time to utilize your knowledge, open a command line and type "ping www.funtrivia.com" to check whether or not the FunTrivia server is alive (FunTrivia does not block ping requests). In that, you have tried to communicate with port 7 of the FunTrivia server. True False

6. Your PC keeps getting out of sync with the correct time of day. Manually adjusting it is so 19th century. Finally, you decide to follow the advice of a friend and hook up your PC to a server which will automatically do the job. The friend tells you it is very easy to remember the port used by this service. It's 123. Which protocol is your PC using to synchronize its clock? TIME NTP DAYTIME NNTP

7. Internet banking cannot use security-agnostic protocols such as HTTP. The Secure HTTP protocol (HTTPS) was developed for such applications which require encrypted transfer of data. Since HTTPS and HTTP are basically similar, the only difference being the added security layer, both have the same Well Known port. True False

8. In the past, numerous attacks on home PCs utilized the fact that, by default, some MS Windows services opened certain ports for incoming traffic. One of the most notorious cases is the "NetBIOS trio". Many users have lost their sanity over hacks and exploits on these ports. Which are they? 237,238,239 437,438,439 337,338,339 137,138,139

9. Developed in the late 60s, this is one of the first standardized Internet protocols. It enables its user to interact with a remote server using a terminal emulator. TCP port 23 is used for the communication between client and server. Which is this protocol? SSH SNMP SMTP Telnet

10. RTSP (Real Time Streaming Protocol) is a cool framework for a "network VCR remote control unit". Using RTSP you may instruct a remote video streaming server to start, stop, pause or fast-forward a video you have picked. Which is the default port assigned to RTSP? Answer: (first two digits identical, third is one less)