Which of the following is the best networking appliance for interconnecting multiple logical networks and forwarding data packets between them while…

A router is a network layer (Layer 3) device whose fundamental purpose is to interconnect different logical networks, such as subnets or VLANs. It examines the destination IP address of incoming packets and uses a routing table to determine the most efficient path to forward them to the correct destination network. Routers are specifically engineered and optimized for this packet-forwarding function, making them the best choice for performing inter-network communication with minimal latency.

A. Firewall: A firewall's primary function is security enforcement by inspecting traffic against a ruleset. While many firewalls can route, this inspection process adds latency, making them less optimal than a dedicated router for this specific task.

C. Layer 2 switch: A Layer 2 switch operates at the data link layer, forwarding frames based on MAC addresses within a single logical network (broadcast domain). It cannot natively forward traffic between different logical networks.

D. Load balancer: A load balancer's main role is to distribute traffic across multiple servers to enhance availability and performance for specific applications, not to perform general-purpose routing between distinct networks.

1. Kurose

J. F.

& Ross

K. W. (2021). Computer Networking: A Top-Down Approach (8th ed.). Pearson. In Section 4.4

the text describes the router's core function: "A router’s primary role is to forward datagrams from its incoming links to its outgoing links." It details how routers connect different IP subnets.

2. Comer

D. E. (2018). Computer Networks and Internets (6th ed.). Pearson. Chapter 18

"Routing And Routing Protocols

" states

"A router is a computer that connects two or more networks... The fundamental job of a router is to forward packets."

3. Cisco. (n.d.). What Is a Router? Cisco.com. Retrieved from the official Cisco documentation portal. The document states

"A router is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions on the Internet."

4. Massachusetts Institute of Technology. (2011). 6.033 Computer System Engineering

Spring 2009. MIT OpenCourseWare. In Lecture 10

"Naming

" the notes explain that routers connect different networks (e.g.

LANs) and are responsible for forwarding packets between them

distinguishing their role from switches that operate within a single LAN.