COMPUTER NETWORKING

NETWORK SECURITY

FIREWALLS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What does a router acting as a firewall use to control which packets are forwarded or dropped?
A
ACL
B
IPsec
C
PPTP
D
RDP
Explanation: 

Detailed explanation-1: -An ACL works as a stateless firewall. While a stateful firewall examines the contents of network packets, a stateless firewall only checks if the packets follow the defined security rules. ACLs are tables containing access rules found on network interfaces such as routers and switches.

Detailed explanation-2: -An access control list is an implementation of a type of logic that can selectively permit or deny certain packets to go through an interface. A firewall is a device which examines traffic passing through a part of the network and makes decisions about what to let through and what to block.

Detailed explanation-3: -Type 1: Packet-Filtering Firewalls As the most “basic” and oldest type of firewall architecture, packet-filtering firewalls create a checkpoint at a traffic router or switch.

Detailed explanation-4: -A firewall has one main use and purpose and that is to examine traffic passing through a part of the network and make decisions about what to let through and what to block. ACLs do stateless inspection, which means that the access list looks at a packet and has no knowledge of what has come before it.

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