Podcast
Questions and Answers
Which protocol is used to establish a secure connection between a client and a web server?
Which protocol is used to establish a secure connection between a client and a web server?
- SMTP
- SSL/TLS (correct)
- HTTP
- FTP
What is the purpose of the SSL/TLS handshake?
What is the purpose of the SSL/TLS handshake?
- To establish a secure connection between the client and server
- To authenticate the server to the client
- To encrypt the data being transmitted
- All of the above (correct)
What is the main difference between HTTP and HTTPS?
What is the main difference between HTTP and HTTPS?
- HTTPS uses port 80 while HTTP uses port 443
- HTTPS is a secure version of HTTP that uses SSL/TLS encryption (correct)
- HTTPS is used for non-sensitive web traffic, while HTTP is used for sensitive web traffic
- HTTPS is faster than HTTP
What is the purpose of a web server?
What is the purpose of a web server?
Which of the following is NOT a common type of web server?
Which of the following is NOT a common type of web server?
What is the purpose of a proxy server?
What is the purpose of a proxy server?
What is the primary function of the SSL/TLS protocol?
What is the primary function of the SSL/TLS protocol?
Which of the following is NOT a common attribute of a server?
Which of the following is NOT a common attribute of a server?
What is the primary difference between a desktop computer and a server?
What is the primary difference between a desktop computer and a server?
Which of the following is NOT a common service provided by a web server?
Which of the following is NOT a common service provided by a web server?
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Study Notes
Web Servers and Secure Protocols
- HTTPS typically uses one of two secure protocols to encrypt communications: SSL (Secure Sockets Layer) or TLS (Transport Layer Security)
- Both TLS and SSL use an asymmetric Public Key Infrastructure (PKI) system, which uses two keys to encrypt communications: a public key and a private key
- Anything encrypted with the public key can only be decrypted by the private key and vice-versa
- Private keys should remain hidden at all times
SSL/TLS Handshaking Process
- The SSL/TLS handshaking process involves a series of steps to establish a secure connection between a client and a server
Proxy Servers
- A proxy server acts as an intermediary between a website and a device, with traffic passing through the proxy server
- A proxy server can be used for:
- Caching pages and information to speed up retrieval
- Blocking content from being returned or requested
- Proxy servers are commonly used to improve performance and security
Web Server (HTTPS)
- HTTPS was created to ensure the protection of:
- Privacy – Data is not revealed to unauthorized parties
- Integrity – Data is not manipulated or altered in any way by an unauthorized party
- The use of HTTPS protects against:
- Man in the Middle Attack – An unauthorized party intercepts communications between the client and the server
- HTTPS benefits include:
- Users' personal information, such as credit cards, are encrypted and cannot be intercepted
- Users can verify the business or website they are using is registered and the owner is who they say it is
Importance of HTTPS
- HTTPS should always be used for:
- Payment transactions
- Online banking
- Online shopping
- Emails
- Since 2018, HTTPS has been more widely used on websites than original HTTP
Servers and Their Functions
- A server is a dedicated computer that provides services on behalf of clients
- A server can provide services such as:
- Hosting websites
- Data storage
- A server can be configured to provide one or multiple services
- Small organizations may have one server to run multiple services, while a large organization may have one server for a specific task
Attributes of a Server
- Servers should have processors that can process information quickly and should be robust
- Servers should be capable of processing several requests simultaneously while maintaining performance
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