Book Image

CCNA Routing and Switching 200-125 Certification Guide

By : Lazaro (Laz) Diaz
Book Image

CCNA Routing and Switching 200-125 Certification Guide

By: Lazaro (Laz) Diaz

Overview of this book

Cisco Certified Network Associate (CCNA) Routing and Switching is one of the most important qualifications for keeping your networking skills up to date. CCNA Routing and Switching 200-125 Certification Guide covers topics included in the latest CCNA exam, along with review and practice questions. This guide introduces you to the structure of IPv4 and IPv6 addresses and examines in detail the creation of IP networks and sub-networks and how to assign addresses in the network. You will then move on to understanding how to configure, verify, and troubleshoot layer 2 and layer 3 protocols. In addition to this, you will discover the functionality, configuration, and troubleshooting of DHCPv4. Combined with router and router simulation practice, this certification guide will help you cover everything you need to know in order to pass the CCNA Routing and Switching 200-125 exam. By the end of this book, you will explore security best practices, as well as get familiar with the protocols that a network administrator can use to monitor the network.
Table of Contents (24 chapters)
4
Subnetting in IPv4
21
Mock Test Questions
22
Assessments

Configuring and verifying syslog

You must have a syslog server saving all the console messages and of course be able to have a time stamp on it, so you can investigate the incident more precisely. So, how would you configure logging on a router? Here it is:

Router(config)#logging host 192.168.4.1
Router(config)# service timestamp log datetime msec 

Once you configure the preceding command, all console messages will be stored in one location that you can view at your leisure. Even though we configured the timestamp command, that does not mean that you are getting the correct time. You must make sure that all devices on the network are synchronized appropriately to a central server.

R3#clock set 12:00:00 1 January 2018
R3#config T
R3(config)#clock timezone florida -4
R3(config)#ntp server 192.168.4.1 key 1234
R3(config)#logging host 192.168.4.1
R3(config)#service timestamps log...