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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
Wed, 11 Mar 2026 23:00:00 PST
Cisco IOS XR Software Multi-Instance Intermediate System-to-Intermediate System Denial of Service Vulnerability
Read moreWed, 11 Mar 2026 23:00:00 PST
Cisco IOS XR Software CLI Privilege Escalation Vulnerabilities
Read moreWed, 11 Mar 2026 16:00:00 PST
Cisco IOS XR Egress Packet Network Interface Aligner Interrupt Denial of Service Vulnerability
Read moreWed, 11 Mar 2026 16:00:00 PST
Multiple Cisco Contact Center Products Cross-Site Scripting Vulnerabilities
Read moreThu, 5 Mar 2026 0:00:00 PST