a) How is an application-layer gateway (ALG) different from a firewall?
The Application Layer Gateway Service is a part of Microsoft Windows that provides support for third-party plugins. This allows the network protocols to pass through the firewall and contributes to internet connectivity sharing.
Application layer.
The default Windows Firewall also monitors the Application layer
a gateway can translate information between different networks data formats or network architecture. most gateways operate at the application layer. it can also be operated on network or session layer. by: talha jamal and farhan moin (kinpoe)
An application firewall specifically monitors and filters traffic to and from an application, focusing on the application layer (Layer 7) of the OSI model, which allows it to inspect and control specific application-level protocols, such as HTTP or FTP. In contrast, a network firewall operates at lower layers (Layers 3-4) and primarily filters traffic based on IP addresses, ports, and protocols, providing broader network protection. While network firewalls safeguard the overall network perimeter, application firewalls offer more granular security by examining the data being transmitted and enforcing policies specific to individual applications.
Stateful firewall checks more than just the ACK flag;it inspects the sequence numbers to ensure the correct state of the TCP session.
A firewall generally works at layer 3 and 4 of the OSI model. Layer 3 is the Network Layer where IP works and Layer 4 is the Transport Layer, where TCP and UDP function. Many firewalls today have advanced up the OSI layers and can even understand Layer 7 - the Application Layer.
Network layer or layer 3
Maybe it uses false addresses to the external IP
circuit-level gateway
A firewall generally works at layer 3 and 4 of the OSI model. Layer 3 is the Network Layer where IP works and Layer 4 is the Transport Layer, where TCP and UDP function. Many firewalls today have advanced up the OSI layers and can even understand Layer 7 - the Application Layer.
I believe it's a router. I have this question on a test the choices are. router, hub, layer 2 switch or firewall. I answered layer 2 switch. It was wrong.