COMPUTER NETWORKING

Detailed explanation-1: -Interfaces. Most small office/home office (SOHO) firewalls have only two interfaces. On enterprise firewalls, there can be well over a half dozen interfaces that comprise various demilitarized zones (DMZ) with varying levels of security.

Detailed explanation-2: -Which statement is true of firewalls? They protect against external access, but they leave networks unprotected from internal intrusions.

Detailed explanation-3: -The correct answer is It is unable to permit legitimate communication to pass. A firewall is a network security device/software that monitors incoming and outgoing network traffic and permits or blocks data packets based on a set of security rules.

Detailed explanation-4: -Multiple firewalls are most commonly used to segregate networks of different sensitivity levels. Universities, for example, commonly use a series of layered firewalls to provide different zones of security for various types of users.