The things to know for the exam regarding this topic is that IPv6 supports 128-bit addresses and IPv4 supports “only” 32-bit addresses. And that IPv6 includes mandatory IPSec security.
Encapsulation allows a transport protocol to be sent across the network by adding header information. This video explains it fast and easy:
In order to pass the exam you’ll need a basic understanding of protocols and services, but I wont go deeper into this subject right now. The book mentioned at the bottom of the post has a little explanation in it. But you can easily gain some basic knowledge about this topic with a little google search or the links I’ll provide.
Just remember, you don’t need to be an expert on this subject. But basic knowledge is required to pass.
In the last lesson we talked about the differences between TCP and UDP. TCP is connection oriented and in order to establish the connection it needs a three-way handshake.
Basically it’s the client knockin on the hosts door asking him if he can come in (by sending ISN (initial sequence number) and a message). The Host responds with yes or no (his ISN and a value indicationg its buffer). The client than says thank you (sends an aknowledgement back to the host).
Or more techy:
A host and a client can have an established connection on any port simultaniously.