Which layer does the network security device belong to
Data-link layer: Bridges, Modems, Network cards, 2-layer switches. Physical Layer - Physical layer of TCP/IP model is responsible for physical connectivity of two devices. Imagine that you are accessing a secure web page, you immediately notice that you are using HTTPS (HTTP is an application layer protocol) ( which uses TCP port 443 at the transport layer). Firewalls are critical components of network security, acting as barriers between trusted internal networks and untrusted external networks. A layer is a way of categorizing and grouping functionality and behavior on and of a network. At layer N−1 the SDU is concatenated with a header, a footer, or both, producing a.
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