The study of computer network concepts or Computer Network Training is to prepare for certification and employment as a network tech. The CompTIA organization has a Network+ life-
OSI Model
time certification that can help you to get a job in the exciting IT (Internet Technology) field. One of the first areas of study is the seven layer OSI Model. The better you understand the OSI Model the better you will understand computer networking. I would strongly suggest that you get very familiar with this model, the associated protocols, functions, equipment, and PDU’s at each layer.
PDUs (protocol data units)
PDUs are data packets associated with each level of the OSI Model. Layer 1 the Physical layer the PDU is called a Bit. Layer 2 the Data Link layer the PDU is called a Frame. Layer 3 the Network layer the PDU is called a Packet. Layer 4 the transport layer the PDU is called a Segment. Above layer 4 the PDU is called Data.
The study of Computer Network Training and Computer Repair Training can lead to some very rewarding careers. But remember the OSI Model is the key to understanding how networks function.
download files to website. Filezilla is another great Open Source program that is fast and efficient. FTP is a convenient utility for managing files on a website. It normally uses ports 20 and 21 for commands and data but by using its passive mode you can bypass firewalls that block or filter those ports. Passive mode works by having the client side assign new FTP ports to the server for both commands and data transfer that side steps the firewall. When you first start Filezilla you see a window that has you local computer files listed on the left and the website files on the right. Just highlight the folders on the website by right clicking and then select the folders on your computer by selecting and right clicking and select upload. The files and folders will immediately start to transfer to the website. A report provides some details concerning the transfer process. We also have some