Month: September 2021

Purpose This article describes the concepts, limitations, and some configuration examples (specifically for Cisco and HP) of link aggregation, NIC teaming, Link Aggregation Control Protocol (LACP), and EtherChannel connections between ESXi/ESX and physical network switches. Resolution Note: Many requirements must be considered before implementing any form of link aggregation. For detailed and related information about these requirements, see Host requirements for link aggregation for ESXi and ESX (1001938). Link aggregation concepts: EtherChannel: This is a link aggregation (port trunking) method

NTP (Network Time Protocol) is an Internet protocol that precisely synchronizes computer clocks on a network with a time source. It can keep the difference between the local clock and a reference clock within 1 millisecond. The NTP server address provided by the Fudan University Network Center is: ntp.fudan.edu.cn . Client Setup Instructions: Windows XP Double-click the clock in the lower-right corner of the taskbar -> Select Internet Time -> Enter “ntp.fudan.edu.cn” as the server address. Windows 2000 　　1. Go to

  1. Communication Media and Data Links: The unit of transmission rate is bps (Bits Per Second). Strictly speaking, the speed at which signals travel through any transmission medium is constant. Therefore, even if data links have different transmission rates, the transmission speed will not fluctuate (because the speed of light and electric current is constant). Transmission rate is also called bandwidth. The greater the bandwidth, the stronger the network’s transmission capability. In addition, the actual transmission rate between hosts

Introduction When learning networking, hands-on labs are unavoidable — yet most people don’t have real hardware and can’t build a real environment. Fortunately, the networking field offers a wealth of simulators that can faithfully emulate more than 90% of functionality, achieving a level of realism that is hard to distinguish from the real thing. This is good news for network learners. Below we introduce the simulators most commonly used by network engineers. Cisco or Huawei? Before we begin, let’s answer