NAT vs PAT: Key Differences, NAT Types, and How They Work
NAT and PAT both translate private IP addresses to public ones, but PAT also translates ports. Plain NAT (static or...
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VLAN vs Subnet: Key Differences and How They Work Together
A VLAN and a subnet both segment a network, but at different layers. A VLAN isolates devices into separate broadcast...
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How to Read Cisco Switch Port Numbers: Interface Numbering Explained
A Cisco switch port name like GigabitEthernet1/0/1 reads as an interface type followed by three numbers — stack member / module / port....
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What Is Cisco ISE? Identity Services Engine Explained for NAC and Zero Trust
Cisco ISE (Identity Services Engine) is Cisco’s network access control (NAC) and policy platform. It authenticates users and devices, checks...
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Patch Panel vs Switch: Do You Need Both?
A patch panel and a switch do completely different jobs: a patch panel passively terminates and organizes your cabling, while a switch actively forwards...
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What Is an Uplink Port on a Switch?
An uplink port is the switch port that connects “up” to the next device in the network hierarchy — a...
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What Is an SFP Port on a Switch?
An SFP port is a modular slot on a network switch that accepts a small, hot-swappable transceiver module. The port...
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Cisco IE Switch PoE Not Working: Industrial Troubleshooting Guide
When a Cisco Industrial Ethernet (IE) switch powers on but delivers no PoE, the cause is usually the power input,...
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C9300 Switch Reset to Factory: Keep IOS and Clear Config
For most C9300 switch reset-to-factory jobs, use write erase, delete flash:vlan.dat when VLAN database cleanup is required, and reload without saving the current...
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Catalyst 9300 Password Recovery Guide: Recover Without Losing Config
Recovering a Catalyst 9300 password is usually a configuration-preserving IOS XE procedure, not a factory reset. Connect through the console,...
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How to Enable PoE on Cisco Switch: CLI Commands and Checks
On most Cisco Catalyst PoE switches, PoE is already enabled by default on PoE-capable ports. To explicitly enable or re-enable...
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Cisco ASA Password Recovery 2026: Firepower 1010, 2100, 3100, 4100, and 4200
Cisco Firepower and Secure Firewall platforms do not all use the same ASA password recovery process. On newer platforms, the...
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C9300L-48PF-4X-E vs C9300L-48P-4X-E: 890W vs 505W PoE Compared (2026)
C9300L-48PF-4X-E and C9300L-48P-4X-E are both Cisco Catalyst 9300L 48-port 1G PoE+ access switches with four fixed 10G/1G SFP+ uplinks, StackWise-320...
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How to Buy NXOS-AD-XF License When Cisco No Longer Offers It as a Standard Order
Quick Answer: Can You Still Buy NXOS-AD-XF? NXOS-AD-XF is the NX-OS Advantage license for Cisco Nexus 9300 10G+ platforms. In...
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Cisco Products Datasheets Download Center
Looking for Cisco datasheet PDF download resources? This Cisco Products Datasheets Download Center provides a categorized collection of Cisco product...
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