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Implementing and Administering Cisco Solutions: 200-301 CCNA Exam Guide

Implementing and Administering Cisco Solutions: 200-301 CCNA Exam Guide

By : Glen D. Singh
4.8 (25)
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Implementing and Administering Cisco Solutions: 200-301 CCNA Exam Guide

Implementing and Administering Cisco Solutions: 200-301 CCNA Exam Guide

4.8 (25)
By: Glen D. Singh

Overview of this book

In the dynamic technology landscape, staying on top of the latest technology trends is a must, especially if you want to build a career in network administration. Achieving CCNA 200-301 certification will validate your knowledge of networking concepts, and this book will help you to do just that. This exam guide focuses on the fundamentals to help you gain a high-level understanding of networking, security, IP connectivity, IP services, programmability, and automation. Starting with the functions of various networking components, you’ll discover how they are used to build and improve an enterprise network. You’ll then delve into configuring networking devices using a command-line interface (CLI) to provide network access, services, security, connectivity, and management. The book covers important aspects of network engineering using a variety of hands-on labs and real-world scenarios that will help you gain essential practical skills. As you make progress, this CCNA certification study guide will help you get to grips with the solutions and technologies that you need to implement and administer a broad range of modern networks and IT infrastructures. By the end of this book, you’ll have gained the confidence to pass the Cisco CCNA 200-301 exam on the first attempt and be well-versed in a variety of network administration and security engineering solutions.
Table of Contents (26 chapters)
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1
Section 1: Network Fundamentals
6
Section 2: Network Access
9
Section 3: IP Connectivity
12
Section 4: IP Services
15
Section 5: Security Fundamentals
20
Section 6: Automation and Programmability
22
Chapter 16: Mock Exam 1
23
Chapter 17: Mock Exam 2

What are ACLs?

As you have learned so far, routers are used to forward traffic between different networks. As a packet enters an inbound interface of a router, the operating system has to read the Layer 3 header information, such as the source and destination IP addresses, and check the routing table for a suitable route. Once a route has been found, the router forwards the packet through an outbound interface to its destination. Ensuring that all users are able to send and receive messages is excellent in terms of connectivity, but what do security and the restriction of traffic flow between certain networks mean?

The Cisco IOS router has many amazing features and can perform a variety of roles on a network. One such feature is to perform traffic filtering between networks. This is done using a very special method that firewall appliances use to filter traffic, known as an ACL.

Important note

Firewall appliances use a variety of methods to filter inbound and outbound traffic...

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