![]() ![]() |
1.2 | ![]() |
Key Characteristics of Scalable Internetworks | |
1.2.6 | ![]() |
Making the network accessible but secure |
Accessible networks let users connect easily over a variety
of technologies. Campus LAN users typically connect to routers at the
access layer through Ethernet or Token Ring. Remote users and sites
may have access to several types of WAN services. Cost and geography
play a significant role in determining what type of WAN services an
organization can deploy. Therefore, Cisco routers support all major
WAN connection types. As shown in Figure
![]()
Circuit-switched networks are dialup, and leased lines are dedicated.
Often, the easier it is for legitimate remote users to access the network, the easier it is for unauthorized users to break in. An access strategy must be carefully planned so that resources, such as remote access routers and servers, are secure. If a company enables users to telecommute through dialup modem, the network administrator must secure access. The routers can be secured with access lists. Routers can also be secured with authentication protocol, such as the Password Authentication Protocol (PAP) or the Challenge Handshake Protocol (CHAP). These protocols require the user to provide a valid name and password before the router permits access to other network resources.
|