Fdaytalk Homework Help: Questions and Answers: Which of the following approaches provide(s) security to the web on the network level?
a) TLS
b) IPsec
c) SSL
d) Kerberos
Answer:
First, let’s understand what “security on the network level” means:
- Network-level security focuses on protecting data as it travels across a network.
- It typically operates at lower layers of the OSI model, particularly at the Network Layer (Layer 3) or Transport Layer (Layer 4).
With this understanding, now we need to determine which of the given options provide security to the web at the network level.
Given Options: Step by step analysis
a) TLS (Transport Layer Security)
- TLS is a cryptographic protocol designed to provide secure communication over a computer network. It is widely used to secure communications on the web, typically in applications like HTTPS.
- However, It typically operates at lower layers of the OSI model, particularly at the Network Layer (Layer 3) or Transport Layer (Layer 4).
b) IPsec (Internet Protocol Security)
- IPsec is a suite of protocols used to secure Internet Protocol (IP) communications by authenticating and encrypting each IP packet in a communication session. It secures all traffic at the IP level, regardless of the application.
- It operates at the network layer (Layer 3) of the OSI model, providing security at the network level.
- IPsec is commonly used in implementing Virtual Private Networks (VPNs).
c) SSL (Secure Sockets Layer)
- SSL is a cryptographic protocol that was the predecessor to TLS. Like TLS, SSL operates at the transport layer (Layer 4) and is used to secure communications over a network, such as HTTPS. While it provides security for web communications, it does not operate at the network level.
- SSL is now considered obsolete and insecure, and has been largely replaced by TLS.
d) Kerberos
- Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications using secret-key cryptography.
- It operates at the application layer (Layer 7) and provides authentication services rather than directly securing network communications.
Final answer
Based on the above analysis, the correct answer is:
Correct answer: IPsec (Option B)
While all these protocols contribute to network security in some way, but IPsec is the only one that operates directly at the network level (Layer 3). This allows it to secure all IP traffic regardless of the higher-level protocols or applications in use. Making it the most comprehensive “network-level” security solution among the options provided.
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