CompTIA Network+ Exam Cram Notes

Chapter 1: Networking Concept
Purposes and Uses of Ports and Protocol
TCP/IP suite provides end-to-end connectivity by specifying that the data should be packetized, addressed, transmitted, routed and received on a TCP/IP network.
Protocols and Ports
 Many protocols run on the different layers of the OSI model and their port numbers identifies those protocols
 The protocols and the ports associated with them are as follows:
SSH 22
 SSH involves SSH servers that use the Public Key Infrastructure (PKI) in the form of an RSA key
 The server sends its public key to the client that creates a session ID and encrypts the server’s key by using the public key, and sends it back to the server
 The server decrypts this session key ID and uses to forward all data
 Only the client, and the server knows this session ID
 SSH uses port 22 and TCP for connections