IT Helpdesk Tips
ICMP is short for Internet Control Message Protocol. It is one of mail internet protocols. This network layer protocol provided control, troubleshooting and error messaging. It works over IP, but it is not transport layer, like TCP and UDP.
Ping, tracert and pathping are some of tools on this level. Continue reading “ICMP – use of”
TCP/IP is acronim for Transmission Control Protocol / Internet Protocol. They are two main protocols used in modern networks.
Continue reading “What is TCP/IP?”
If the label of your computer is missing and the system will power up, you can easily find serial number of laptop/PC as it is written into the BIOS on the system board.
Command Prompt:
Run an elevated command prompt, Enter the command “wmic bios get serialnumber” (without the quotations).
Task:
Task is:
This is an example how to make static routing between two networks: 192.168.0.0/24 and 192.168.1.0/24. Connection between two routers is made using serial ports Serial 0/1/0 on both routers.
AS (Autonomous System) is group of networks controlled by one administrator (With common administration), as one ISP or enterprise organisation. According to way how they exchange routes, within an AS or between them, we can divide routing protocols to IGP and EGP Continue reading “IGP vs EGP”
Routing protocols use different traffic types to control how routing information are exchanged.
For access to router / switch using aux / auxiliary port with or without modem, we can set password.
For access to router / switch using Telnet we use the Virtual Teletype (VTY) lines. To protect VTY port from unwanted access, we must configure password on this port. Also, if password is not configured and enabled, Telnet access will not be possible.