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For example, the sample diagram does not indicate the physical type of connection between the PCs and the switch, but since a modern LAN is depicted, Ethernet may be assumed. If the same style of line was used in a WAN (wide area network) diagram, however, it may indicate a different type of connection.
Like SLIP, this is a full Internet connection over telephone lines via modem. It is more reliable than SLIP because it double checks to ensure Internet packets arrive intact. [4] It resends any damaged packets. PPP was designed somewhat after the original HDLC specifications. The people who had designed PPP included many additional features ...
Eventually, ISPs began providing residential gateways which combined the modem and broadband router into a single package that provided routing, NAT, security features, and even Wi-Fi access in addition to modem functionality, so that subscribers could connect their entire household without purchasing any extra equipment.
A modem and router work in tandem to deliver you an internet connection and then grant access to your various devices. Modem vs. router: The differences between the pieces of hardware that connect ...
The following diagram shows a scenario where an Ethernet-connected ADSL modem acts as a PPPoE-to-PPPoA protocol converter and the service provider offers a PPPoA service and does not understand PPPoE. There is no PPPoEoA in this protocol chain. This is an optimally protocol-efficient design for a separate ADSL modem connected to a router by ...
The main purpose of a router is to connect multiple networks and forward packets destined either for directly attached networks or more remote networks. A router is considered a layer-3 device because its primary forwarding decision is based on the information in the layer-3 IP packet, specifically the destination IP address. When a router ...
A CSU/DSU can have an external connection point or it can be integrated into a modular card installed in a router. A CSU/DSU is the equivalent of the modem for an entire LAN . The DCE, commonly a modem or CSU/DSU, is the device used to convert the user data from the DTE into a form acceptable to the WAN service provider transmission link.
A conceptual diagram of a LAN at a residential house; the router in this case is assumed to also function as a wireless access point.Also shown in this example (shaded in yellow) is the network's connection to the Internet via fixed-line means.