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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.
Read moreSyslog Overview and Configuration
Match elements of syslog messages to their descriptions in an example. Configure syslog server on Cisco IOS devices.
Read morePPP authentication. PAP vs CHAP
Describe PAP and CHAP authentication and configure CHAP authentication for PPP.
Read moreDeveloping an Optimum Design for Layer 2
Typical causes of network congestion. Presenting the bridge and the switch as alternative options to alleviate those issues.
Read moreExploring 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.
Read moreUnderstanding 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.
Read moreLatest security threats
Fri, 17 Jul 2026 15:34:03 PST
Cisco Identity Services Engine Stored Cross-Site Scripting Vulnerabilities
Read moreWed, 15 Jul 2026 22:09:28 PST
Cisco Catalyst SD-WAN Controller, Catalyst SD-WAN Manager, and Catalyst SD-WAN Validator Authenticated Privilege Escalation Vulnerability
Read moreWed, 15 Jul 2026 16:01:10 PST
Cisco Advance Notification for Publication of July 15, 2026, Security Advisories
Read moreMon, 6 Jul 2026 19:20:30 PST