Networking - wireless, routers, firewalls, Cisco NAS - 003 - Do I have a router at home
A computer network is a collection of two or more computer systems that are linked together. A network connection can be established using either cable or wireless media. Hardware and software are used to connect computers and tools in any network. A computer network consists of various kinds of nodes. Servers, networking hardware, Personal computers, and other specialized or general-purpose hosts can all be nodes in a computer network. Wired/Wireless Networking: Wired Network: As we all know, “wired” refers to any physical medium made up of cables. Copper wire, twisted pair, or fiber optic cables are all options. A wired network employs wires to link devices to the Internet or another network, such as laptops or desktop PCs. Wireless Network: “Wireless” means without wire, media that is made up of electromagnetic waves (EM Waves) or infrared waves. Antennas or sensors will be present on all wireless devices. Cellular phones, wireless sensors, TV remotes, satellite disc receivers, and laptops with WLAN cards are all examples of wireless devices. For data or voice communication, a wireless network uses radiofrequency waves rather than wires. Basic network commands: ipconfig – TCP/IP configuration information for your PC ipconfig /all – more details, including MAC addresses, DHCP information etc ping x.x.x.x – tests if a host/server is alive (be aware some firewalls will not allow ping icmp) tracert - displays route taken to a remote host nbtstat - gives statistics and technical NetBIOS details. NetBIOS over TCP/IP (NetBT) resolves NetBIOS names to IP addresses netstat - protocol statistics and current TCP/IP connections hostname - displays the networking computer name
A computer network is a collection of two or more computer systems that are linked together. A network connection can be established using either cable or wireless media. Hardware and software are used to connect computers and tools in any network. A computer network consists of various kinds of nodes. Servers, networking hardware, Personal computers, and other specialized or general-purpose hosts can all be nodes in a computer network. Wired/Wireless Networking: Wired Network: As we all know, “wired” refers to any physical medium made up of cables. Copper wire, twisted pair, or fiber optic cables are all options. A wired network employs wires to link devices to the Internet or another network, such as laptops or desktop PCs. Wireless Network: “Wireless” means without wire, media that is made up of electromagnetic waves (EM Waves) or infrared waves. Antennas or sensors will be present on all wireless devices. Cellular phones, wireless sensors, TV remotes, satellite disc receivers, and laptops with WLAN cards are all examples of wireless devices. For data or voice communication, a wireless network uses radiofrequency waves rather than wires. Basic network commands: ipconfig – TCP/IP configuration information for your PC ipconfig /all – more details, including MAC addresses, DHCP information etc ping x.x.x.x – tests if a host/server is alive (be aware some firewalls will not allow ping icmp) tracert - displays route taken to a remote host nbtstat - gives statistics and technical NetBIOS details. NetBIOS over TCP/IP (NetBT) resolves NetBIOS names to IP addresses netstat - protocol statistics and current TCP/IP connections hostname - displays the networking computer name