Within the provided format, describe and explain Internet protocol security (IPSec) when responding to the questions below:
- Title Page
- Introduction
- What are the services that are provided by IPSec?
- What is the difference between transport and tunnel modes?
- Describe the different services provided by AH and ESP.
- What is a replay attack?
- List 3–5 practical applications of IPSec.
- Conclusion
- APA Reference List
What is the difference between transport and tunnel modes?
Introduction
If you have ever seen a cargo truck or container ship, you may have wondered what’s the difference between transport and tunnel modes. The answer is simple: there is no difference. Transport mode means that the vehicle is able to carry goods from one place to another, whether it’s on land or at sea. Transport mode can be used for road vehicles such as heavy duty trucks and buses, rail cars like trains and ships; however it also applies to aircraft too!
Transport mode
Transport mode encrypts the IP packet data. The IPSec header and trailer are not encrypted; they only contain information that is necessary for proper decryption of the payload. Transport mode is used when:
You want to encrypt traffic between two endpoints, but don’t need to send any additional information along with it (such as a NAS-IPsec tunnel).
You want to decrypt traffic from an endpoint, but don’t need to send anything encrypted into that direction (like when using IPsec natively).
Conclusion
In conclusion, transport mode is a better choice for many reasons. It is faster and more reliable than tunnel mode.