Interfaces & Modules

1. How Many Types of SFP Transceivers Do You Know?
   50
   What is SFP? The small form-factor pluggable (SFP) or Mini-GBIC is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications. It interfaces a network device mother board (for a switch, router, fiber media converter or similar device) to a fiber ...
2. SFP vs. SFP+: What’s the difference?
   leo peng

   149
   SFP Definition SFP, which stands for small form-factor pluggable, is a compact, hot-pluggable optical module transceiver used for both telecommunication and data communications applications. The devices are designed for use with small form factor (SFF) connectors, and offer high speed and ...
3. QSFP vs. SFP: What’s the difference between QSFP and SFP?
   56
   SFP, small form-factor pluggable for short, is a compact, hot-pluggable transceiver module used for both telecommunication and data communications applications. The Quad Small Form-factor Pluggable (QSFP) is a compact, hot-pluggable transceiver used for data communications applications. The ...
4. Cisco USB Console Port
   729
   Due to the high prices of the USB To Serial cable converter used to connect to the console cable of CISCO devices, CISCO has added a new USB console port to its products, that uses a cheap USB cable, that also widely used with other devices, for example external USB hard disk. Also the ...
5. SFP vs. RJ45: How should we wire them respectively?
   40
   Rj45 port: Gigabit Ethernet switch’s RJ45 port is a built-in port. To connect two RJ45 port Gigabit Ethernet switches, we only need to use a super five or six cable. The following table is the specific rate and bandwidth of this connection: RJ45 connection and SFP connection of Gigabit ...
6. What is poe and Why is it Worth?
   33
   Power over Ethernet (POE) is a kind of technology that allows network cables to also carry electricity in order to power devices. For many connected devices, like networked surveillance cameras or IP cameras, two connections would normally be needed – an electrical connection, ...
7. What is the difference between PoE and PoE+?
   45
   Power over Ethernet or PoE technology describes a system to pass electrical power safely, along with data, on Ethernet cabling. The IEEE standard for PoE requires Category 5 cable or higher for high power levels, but can operate with category 3 cable for low power levels. Power is ...
8. What Is the Difference Between DWDM and CWDM Optical Technologies?
   47
   CWDM and DWDM are two acronyms that mobile operators are hearing a lot as they densify their networks with small cells. CWDM is coarse wave division multiplexing and DWDM is dense wave division multiplexing. Wave division multiplexing is a way to increase the bandwidth of fiber by combining ...
9. What are Straight and Crossover cable?
   Selene Gong

   801
   Ethernet cables can be wired as straight-through or crossover. The straight-through is the most common type and is used to connect computers to hubs or switches. Crossover cables are less common and mainly used to connect similar devices directly, such as one computer to another. What Is ...
10. Can I use Cisco 6800 switch modules with my 6500 switch?
    37
    The Cisco Catalyst® 6800 Series Switches offer a variety of 10 Gigabit and Gigabit Ethernet modules which work in conjunction with the Catalyst 6500 Supervisor Engine 2T/2TXL (VS-S2T-10G & VS-S2T-10GXL) to serve different needs in the campus and data center for enterprise, commercial, ...