First, assume two Cisco routers, R1 (server) connected to R2 (client), forming a simple chain LAN. Now let’s implement DHCP. The configuration commands and their explanations are as follows: 1. DHCP service configuration on R1 dhcp#configure terminal//Enter global configuration mode dhcp(config)#service dhcp// …
When using broadband internet, if the local connection status shows “Network cable unplugged,” you generally need to check and troubleshoot from the following aspects: 1. Network cable issues (the cable is broken, the RJ45 connector is loose, the cable itself has quality problems, such as being chewed by mice). 2. The connected device is faulty or powered off (for example, the connection with …
Port mirroring is a method of copying data from one or more switch ports to one or more other ports. Its function is to replicate packets from specified ports or VLANs to other ports, with the destination port connected to a data monitoring device. To facilitate traffic analysis on one or more network interfaces, you can …
To achieve a better network experience, I usually upgrade the router firmware. Likewise, when router software malfunctions, it can also be resolved through an update. Of course, if you want to upgrade your router firmware, it鈥檚 best to have some basic computer skills; otherwise, you might run into unnecessary trouble. Here …
Different Interfaces on a Router: WAN vs LAN Port Explained
For the average user, the only ports you’ll need on a router are the WAN and LAN ports. While these two interfaces look identical on the outside, their functions are completely different. This article explains the differences between WAN and LAN ports. 1. WAN is the abbreviation for Wide Area Network, representing a wide…
Traditional switches can no longer meet the demands of internet cafe networks. Today, Layer 2 switches are the standard 鈥?devices operating at the second layer of the OSI model, the data link layer. As a trending internet cafe topic, we鈥檒l focus on the differences between a Layer 2 switch and a router. 1. Subnetting: A switch can only recognize MAC addresses. MAC addr …
This article was authored by John D'Ambrosia and Chauncey Schwartz. The former serves as Chairman of the Ethernet Alliance Board of Directors and Chief Ethernet Evangelist in Dell鈥檚 Office of the CTO, while the latter is Chairman of the Ethernet Alliance Marketing Committee and Technical Marketing Manager at QLogic. IEEE 802.3 bandwidth assessment …
When using a router, pairing it with a wireless network card from the same brand ensures the best compatibility and can effectively boost wireless transmission speeds. However, various issues may still arise during use. Currently, wireless network cards mainly come in two interface types: PCI and USB. Regardless of the type, they must be inserted …
With the release of the IEEE 802.11n draft, wireless router transmission speeds have made a qualitative leap. However, many users only focus on speed while overlooking wireless network security. Take my own experience, for example: from my apartment balcony, I can pick up seven or eight wireless connections, some of which don’t even have a password set, allowing me to easily…
With various viruses and attacks running rampant across networks without restraint and causing significant damage, more and more routers now come with built-in firewall functionality. For high-end routers, you can further configure them via commands to minimize losses caused by viruses and attacks. This article takes H3C routers as an …
