FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -The router is a layer 3 device only. Which of the following does the router use for identifying allowed or denied packets? (a router acting as a firewall on layer 3 is capable of making forwarding decisions based on the ip address.

Detailed explanation-2: -A firewall is the best device to deploy if you want to protect your private network from a public untrusted network. Firewalls are used to control traffic entering and leaving your trusted network environment.

Detailed explanation-3: -Static Packet Filter The static packet filtering firewall operates only at the network layer (layer 3) of the OSI model and does not differentiate between application protocols. This type of firewall decides whether to accept or deny individual packets, based on examining fields in the packet’s IP and protocol headers.

Detailed explanation-4: -From my understanding, a Layer 3 switch can handle cross-communication between separate LANs and VLANs, as well as fine-tuned ACL control between VLANs. Despite this, I know a Layer 3 switch should definitely not be used in place of a Firewall, such as between your LAN and WAN.

Detailed explanation-5: -A packet-filtering firewall includes a router to direct the flow of network traffic. Using screening rules, packet filtering routers maintain a continuous circulation of incoming and outgoing packets with maintaining the basic function of a router.