How to Configure a Cisco ASA Firewall: Step-by-Step CLI Guide
Quick answer: A working Cisco ASA baseline needs correctly addressed and enabled inside/outside interfaces, a default route, source PAT for the...
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Cisco Optics SKU Decoder: How to Read Common Ethernet Optics Part Numbers
Quick answer: Read most modern Cisco Ethernet optics product IDs (PIDs) from left to right: family → speed → media/reach → variant. SFP-10G-SR-S,...
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Cisco MDS 9148T vs 9148V: Choosing Between 32G and 64G Fibre Channel
The Cisco MDS 9148T and MDS 9148V are both 48-port, 1RU fixed Fibre Channel switches in the MDS 9100 Series,...
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Cisco Desk Phone 9800 Series Guide: 9811 vs 9841 vs 9851 vs 9861 vs 9871
The Cisco Desk Phone 9800 Series is Cisco’s current desk phone line: five models (9811, 9841, 9851, 9861, 9871) plus...
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Cisco Industrial Switches for Substations: Which Models Qualify and How to Choose
For substation deployments, Cisco’s current platform answer is the Catalyst IE9300 Rugged Series: a 1RU rack-mount switch certified to IEC...
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When to Choose 4G vs 4X vs 8X Network Modules in Catalyst Switches
In Cisco Catalyst uplink naming, 4G means four 1G SFP ports, 4X means four 10G SFP+ ports, and 8X means...
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Cisco Nexus 9300 100G vs 400G vs 800G: Which Fabric Speed Fits?
On the Cisco Nexus 9300, 100G, 400G, and 800G are three current platform generations, and the right one is decided...
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Cisco Nexus 9300 NX-OS Mode vs ACI Mode: Which to Choose Before You Order
Cisco Nexus 9300 switches run either Cisco NX-OS or Cisco ACI, and the two modes are mutually exclusive boot images...
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Cisco Unsupported Transceiver Error: Causes, Fixes, and Compatibility
A Cisco unsupported transceiver error means the switch has read the identity programmed into an SFP module and refused to...
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What Is Cisco Non-Stop Forwarding (NSF) and How Does It Work?
Cisco Non-Stop Forwarding (NSF) is a high-availability feature that keeps a router or switch forwarding IP packets while its control...
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Cisco Nexus 93180YC-FX3 Transceiver Compatibility Guide (N9K-C93180YC-FX3)
A socket that accepts a module is not a switch that supports it. An optic earns its line in an...
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GLC-T vs GLC-TE vs SFP-GE-T: Which Cisco Copper SFP to Buy
GLC-T, GLC-TE, and SFP-GE-T are electrically the same module — a 1000BASE-T copper SFP running 1 Gbps over Category 5...
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Cisco Catalyst 8300/8200 Expansion Modules: Which Card Adds Ports, Voice, and 5G?
On a Cisco Catalyst 8300 or 8200, every capability maps to one module family in one slot type: Catalyst 8300...
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Cisco Router Throughput Explained: CEF, IPsec, and SD-WAN IPsec
Cisco router performance is a set of parameters, not one number. A datasheet reports CEF (IP forwarding) throughput for plain...
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Cisco Catalyst 8500 vs ASR 1000 and 8500L: Enterprise Edge Router Selection
A practical selection guide for Cisco Catalyst 8500 Series Edge Platforms — choosing between C8500-12X4QC, C8500-12X, and C8500L-8S4X, and comparing...
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