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Assess your readiness for the CompTIA Network+ Exam and quickly identify where you need to focus and practice.

This guide walks you through each exam objective, providing "need to know" checklists, review questions, and tips to help bolster your preparation.

This book is an ideal complement to other CompTIA Network+ exam-prep resources. Click here for more information.

Multilayer Switch

By Stephen Bucaro

Multilayer Switch
Cisco WS-C3560G-48TS-S 3560 48-Port
Multilayer Gigabit Ethernet Switch

A network switch operates at layer 2, the data link layer of the OSI model. It records the MAC (Media Access Control) addresses of the devices attached to its ports. When a frame is received intended for a device connected to one of its ports, it sends that frame only to that device, thereby reducing network traffic.

A multilayer switch also works at layer 3, the network layer of the OSI model. That's why a multilayer switch is sometimes called a layer 3 switch.

At layer 3, data is encapsulated into packets containing the destination IP address. This allows the switch to also perform routing between subnets, which further optimizes network traffic.

The term multilayer means the switch operates at multiple layers of the OSI Model. Today there are multilayer switches that use information in layer 4 segments and protocol data units all the way up to layer 6 of the OSI model.

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CompTIA Network+ Lab Manual

Think of the most common and challenging tasks that network administrators face, then read this book and find out how to perform those tasks, step by step.

Provides step-by-step instructions for many of the tasks network administrators perform on a day-to-day basis, such as configuring wireless components; placing routers and servers; configuring hubs, switches, and routers; configuring a Windows client; and troubleshooting a network.

• Addresses the CompTIA Network+ Exam N10-005 objectives and also includes a variety of practice labs, giving you plenty of opportunities for hands-on skill-building.

Click here for more information