| Network access control mechanisms interoperate to prevent unauthorized access and to enforce the organization's security policy. Access to the network must be categorized as administrator, user, or guest so the appropriate authorization can be assigned to the user requesting access to the network or a network element. Authorization requires an individual account identifier that has been approved, assigned, and configured on an authentication server. Authentication of user identities is accomplished through the use of passwords, tokens, biometrics, or in the case of multifactor authentication, some combination thereof. Lack of authentication enables anyone to gain access to the network or possibly a network element providing an opportunity for intruders to compromise resources within the network infrastructure. This requirement is applicable to network device management and is not applicable to the routing function. |
