WorksheetsSE Web Communications
Total questions: 10
Worksheet time: 17mins
You are working in a small company, and users are complaining that they cannot access any websites.
You suspect that the issue might be related to the network layer in the TCP/IP model.
What would be the first step to diagnose the problem?
When you open Spotify, what layer is the application running on?
Transport
Network
Application
Link
Describe the primary function of the network layer in the OSI model
You are developing a messaging app that requires reliable data transmission, ensuring that messages arrive at their destination in the correct order, even if it takes slightly longer.
Which protocol should you choose, and why?
TCP, because it provides reliable, ordered, and error-checked delivery of data packets.
UDP, because it offers faster data transmission, even though it might result in missing or out-of-order packets.
UDP, because it automatically resends lost packets without causing any delay.
TCP, because it is designed to send data only when the network is idle to avoid congestion.
You are streaming a live video on your computer, but the video keeps buffering intermittently.
You suspect that some data packets might be lost during transmission.
What is the best course of action to improve the video streaming experience?
A user is trying to connect to a website using HTTPS but is encountering a "Certificate Not Trusted" error. What is the most likely cause of this error?
The website is using an HTTP URL.
The SSL certificate is expired or issued by an untrusted Certificate Authority (CA).
The website's domain is incorrectly configured.
The DNS server is unreachable.
Your company’s web server is experiencing delays when receiving data from remote users.
The connection is established, but data transmission is slow.
What layer of the TCP/IP model should you focus on to troubleshoot this performance issue?
Network Layer
Transport Layer
Application Layer
Physical Layer
Your company’s website is accessible through both HTTP and HTTPS, but some users are still using the HTTP version. Why is implementing a server-side redirect from HTTP to HTTPS the best way to ensure all users access the site securely via HTTPS?
A user reports that they are unable to access a secure website and receive a "Connection Timed Out" error.
What is the most likely cause of this issue?
The SSL certificate is invalid.
The server is down or unreachable.
The user's browser is outdated.
The website's domain is not registered.
You are setting up a secure e-commerce website and want to protect user data during transmission.
Identify which protocol should be used between the server and the browser.
