互聯網與互聯網保安：練習題

In the context of the structure of the Internet, which device is primarily responsible for directing data packets across different networks based on their IP addresses?

How does Asymmetric Encryption provide a mechanism for digital signatures to ensure non-repudiation?

When a web browser requests a page via HTTPS, it involves the Domain Name System (DNS). Which of the following best describes the role of the DNS in this process?

What is the primary function of a Gateway when connecting two networks?

When using Network Address Translation (NAT), how does a router typically track which internal host should receive a returning packet from the public Internet?

What is the primary role of a gateway when routing packets across the Internet?

Compare symmetric and asymmetric encryption in the context of securing Internet communications.

Describe how a digital certificate is used by a web browser to verify the identity of a website during a TLS handshake.

The Domain Name System (DNS) is essential for the functioning of the Internet.
a) Explain the purpose of a Fully Qualified Domain Name (FQDN).
b) Describe the step-by-step process a client follows to resolve a domain name to an IP address if the local DNS cache is empty.

A firewall is a critical component of Internet security. Compare packet filtering and stateful inspection. Which method provides higher security and why?