Online CCNA Courses

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The Newest Courses

CUCM Basics

Need to know

Router Internal Components Overview

After completing this topic, you should be able to distinguish between the major internal components of a router; describe the functions of ROM in a Cisco router.
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Syslog Overview and Configuration

Match elements of syslog messages to their descriptions in an example. Configure syslog server on Cisco IOS devices.
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PPP authentication. PAP vs CHAP

Describe PAP and CHAP authentication and configure CHAP authentication for PPP.
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Developing an Optimum Design for Layer 2

Typical causes of network congestion. Presenting the bridge and the switch as alternative options to alleviate those issues.
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Exploring the Packet Delivery Process

How packets go through devices at layers 1, 2, and 3. Mapping between layer 2 and 3 addresses by using ARP. Common tools to determine the path across the network.
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Understanding The TCP/IP Transport Layer

How layer 4 can provide connection-oriented and connection-less services via TCP and UDP. A key component of TCP is flow control - sequence numbers, acknowledgement numbers, and slider windows.
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Latest security threats

Tue, 26 Jan 2021 14:34:33 PST

Cisco DNA Center Information Disclosure Vulnerability

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Mon, 25 Jan 2021 14:01:28 PST

Cisco DNA Center Cross-Site Request Forgery Vulnerability

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Fri, 22 Jan 2021 16:24:32 PST

Cisco Finesse OpenSocial Gadget Editor Vulnerabilities

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Thu, 21 Jan 2021 14:53:26 PST

Cisco Secure Web Appliance Privilege Escalation Vulnerability

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Wed, 20 Jan 2021 20:41:10 PST

Cisco Expressway Software TURN Server Configuration Issue

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Wed, 20 Jan 2021 16:00:00 PST

Cisco Advanced Malware Protection for Endpoints and Immunet for Windows DLL Hijacking Vulnerability

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