A user clicks Send on an email, and the message leaves the computer for the provider's outgoing mail server. Which protocol carries that message on this part of its trip?

A student uploads a project folder to a school server so classmates can download it. Which protocol is designed for this file-transfer job?

A browser requests the text and images for a public webpage without using an encrypted connection. Which protocol makes that web request?

Before connecting to a server, a browser needs to turn the domain name library.example.org into an IP address. Which protocol performs that lookup?

A browser is about to submit a password on a sign-in page and needs the web request protected while it travels across the network. Which protocol should the site use?

A router receives a packet and needs destination addressing information to decide where to forward it. Which protocol in TCP/IP provides that addressing?

A file transfer needs missing pieces requested again and received pieces put back in the correct order. Which protocol in TCP/IP handles those reliability tasks?

A student says HTTP and HTML are the same thing. What is the difference between them?

A shop changes its checkout page from HTTP to HTTPS. A person on the same Wi-Fi captures traffic and also observes the DNS lookup and connection. What can that person still determine?

What is the main change when a browser loads https:// instead of http://?

A browser shows a valid HTTPS lock icon after checking the site's certificate. What does that check help the browser do?

Which information is protected from someone intercepting a properly configured HTTPS connection?

A student uses HTTPS to post a comment on a social-media site. Which statement is accurate?

A network observer watches packets from an HTTPS session. Which packet detail can still be visible even though the page contents are encrypted?

Why is HTTPS preferred over HTTP when entering a credit-card number on a website?

A large file is broken into pieces for transmission. Which pairing correctly assigns the TCP/IP jobs?

Packets from the same file can arrive at a computer out of order. Why can this happen?

Which TCP/IP responsibility belongs to IP rather than TCP?

A packet is lost on its way across the internet. Which statement best describes the roles of TCP and IP?

Why is it inaccurate to say that IP alone guarantees a file will arrive complete and in order?

A student types a new website address into a browser. Which sequence correctly describes the usual early steps before the browser receives the webpage?

When a browser visits a domain name it has not resolved recently, what network task normally happens first?

A browser has received the IP address for a web server from DNS. Before it can send a normal HTTP request, what does TCP do?

During a typical HTTP page load, the TCP connection is ready. What application-level action follows?

A browser loads an HTTPS page at a newly visited domain. Which order is most accurate at a high level?

A student downloads a file from files.example.org using FTP. Which order best describes the needed protocol actions?

A proposed page-load sequence says: “HTTP asks for the page, then DNS finds the server address, then TCP connects.” What is wrong with this sequence?

Two computers made by different companies exchange data successfully across the internet. What is a protocol?

Why must both a client and a server follow the same protocol when exchanging a web request?

A browser sends a message formatted as an HTTP request to a server that expects FTP commands instead. What problem is most likely?