Here are some of the fundamental parts ofa network:
Network - A network is a group of computers connected together in a way that allows information to be exchanged between the computers.
Node - A node is anything that is connected to the network. While a node is typically a computer, it can also be something like a printer or CD-ROM tower.
Segment - A segment is any portion of a network that is separated, by a switch, bridge or router, from other parts of the network.
Backbone - The backbone is the main cabling of a network that all of the segments connect to. Typically, the backbone is capable of carrying more information than the individual segments. For example, each segment may have a transfer rate of 10 Mbps (megabits per second), while the backbone may operate at 100 Mbps.
Topology - Topology is the way that each node is physically connected to the network (more on this in the next section).
Local Area Network (LAN) - A LAN is a network of computers that are in the same general physical location, usually within a building or a campus. If the computers are far apart (such as across town or in different cities), then a Wide Area Network (WAN) is typically used.
Network Interface Card (NIC) - Every computer (and most other devices) is connected to a network through an NIC. In most desktop computers, this is an Ethernet card (normally 10 or 100 Mbps) that is plugged into a slot on the computer's motherboard.
Media Access Control (MAC) address - This is the physical address of any device -- such as the NIC in a computer -- on the network. The MAC address, which is made up of two equal parts, is 6 bytes long. The first 3 bytes identify the company that made the NIC. The second 3 bytes are the serial number of the NIC itself.
Unicast - A unicast is a transmission from one node addressed specifically to another node.
Multicast - In a multicast, a node sends a packet addressed to a special group address. Devices that are interested in this group register to receive packets addressed to the group. An example might be a Cisco router sending out an update to all of the other Cisco routers.
Broadcast - In a broadcast, a node sends out a packet that is intended for transmission to all other nodes on the network.
NAT sometimes is the bane of my existence. I'm trying to setup a vti site-to-site vpn with cisco routers. The VPN connection comes up fine. My problem is that i'm using the same interface for internet access as well. my endpoints can reach the intern...
Hi good day, I have a problem with SW WS-C4503-E, send these messages in the logs;% C4K_EBM-4-HOSTFLAPPING: Host 55: 32: D1: 00: K8: X8 in vlan 100 is moving from port Gi1 / 1 to port Po1It is a constant message, I verify it in the documentation and ...
Hello all, I have 2 stacked switches and I have updated the IOS to CAT3K_CAA-UNIVERSALK9 Version 16.3.8I there a SVI for the vlan where the clients are connected. I have set ip helper-address "DHCP IP" in this SVI, before the update it was ...
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This topic is a chance to discuss more about how you can utilize the Cisco SD-WAN Cloud onRamp for CoLocation solution to c...
This topic is a chance to discuss more about how you can utilize the Cisco SD-WAN Cloud onRamp for CoLocation solution to conquer your cloud initiatives without having to sacrifice security, optimization, latency, and flexibility.
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