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Ethernet (Data link layer) Learning notes

The development process of Ethernet: Transfer media from coaxial cable to twisted pair cable and fiber From the development of shared Ethernet to switched Ethernet VLAN and layer three switching technologies appear Development from low-speed Ethernet to high-speed

Ethernet Data Frame (802.3) maximum and minimum length

Ethernet Data Frame (802.3) maximum and minimum lengthMarch 20, 2017 19:40:01 Farmwang read: 5370 morePersonal Category: TCP/IPEthernet (IEEE 802.3) frame format:1, Preamble code: 7 byte 0x55, a string of 1, 0 interval, for signal synchronization2, Frame starting delimiter: 1 bytes 0xd5 (10101011), indicating the beginning of a frame3. DA (Destination mac): 6 bytes4, SA (Source mac): 6 bytes5, type/Length: 2 bytes, 0~1500 reserved as Length field valu

TCP/IP detailed-Ethernet frame structure IP layer The MSS size in the MTU network

For Gigabit Ethernet, 1000Mbit data can be transmitted per second, i.e. 125000000b/s, with a fixed cost per Ethernet frame: Preamble and Frame start preamble (8B), MAC (12B), type (2B), payload (46b~ 1500B), CRC (4B), Gap (12B), so the smallest Ethernet frame is 84B, can send 1488000 frames per second. The largest Ethernet

Stack 10/100 Ethernet switch High Availability

Ethernet switches are still commonly used, so I studied the high availability of stack 10/100 Ethernet switches. I would like to share with you here, hoping to be useful to you. Catalyst3524-PWRXL Ethernet switches are part of the CiscoSystemsCatalyst3500XL series, which is a series of scalable stack 10/100 and Gigabit Ethern

An Intelligent competition in the Ethernet switch Market

Ethernet switches are still commonly used. So I studied the intelligent features of Ethernet switches and shared them with you here. I hope they will be useful to you. Enterprise applications are surging to Promote the Development of Ethernet switches. Ethernet has the advantages of simple connection and better perform

Enterprise Ethernet switch Solution

Ethernet switches are still commonly used. So I studied the enterprise-level Ethernet switch solution and shared it with you here. I hope it will be useful to you. As the main connection device of the LAN, the Ethernet switch is one of the fastest-growing network devices. With the continuous development of switching technology, the price of

10G Ethernet switch 6808 Comprehensive Test report

Earlier Ethernet switches used the architecture of Gigabit Ethernet switches, but added the 10GE module to support 10 Gbit/s Ethernet. We once made a 10G Ethernet topic named "10g power" in a newspaper in October 13. Many manufacturers mentioned that the early 10G Ethernet p

In-depth analysis of the system development of Ethernet Switches

There are many things worth learning about Ethernet switches. Here we mainly introduce the development of the Ethernet switch system. At present, more and more manufacturers are entering the Ethernet market, new brands and new products are emerging, and there seems to be a trend of Homogeneous Competition. However, it is worth mentioning that, as the number of

Ethernet Services on ATM

ATM Circuit extension technology enables service providers to map multiple VLAN to a virtual circuit, or to map multiple virtual circuits onto a single VLAN. Using this technology as a component, service providers can set up multiple point to point networks on ATM and Ethernet to provide enterprises with more flexible and scalable Ethernet based services.Conceptually, providing

Ethernet switch parameters learning notes

With the development of China's exchange industry, it also promotes the upgrade of various exchange technologies. Here we analyze the specific functions of various main parameters in the Ethernet switch. Generally, fixed configuration switches with no expansion slot support only one type of network. Rack-mounted Ethernet switches and fixed configuration switches with expansion slots support more than one ty

Ethernet switch stack effectively improves network performance

From the data, we can see that the bandwidth of the Ethernet switch stack is dozens of times the speed of the switch port, which can effectively improve the network performance, when the number of ports that a single switch can provide is insufficient to meet the requirements of the network computer, more than two switches must provide the corresponding number of ports, which also involves the connection between switches. Basically, there are two ways

TCP/IP detailed--Data link Layer & Ethernet frame format

The most common package on the link layer is the Ethernet and IEEE 802 packages, where Ethernet is used as the object of instruction. First, the overview of the data link layer belongs to the bottom of the computer network, the use of the channel is mainly a point channel and broadcast channel two types.In the TCP/IP protocol family, the data link layer has three main purposes: 1) Send and receive data for

Constructing Gigabit Ethernet 1000BASE-T with five kinds of twisted-pair wires

How can network managers implement bandwidth-intensive applications on local area networks (LANs) when budgets are tight and must maintain existing network systems? The latest Ethernet technology, 1000BASE-T (Gigabit Ethernet on the five-type twisted pair) can help network administrators quickly improve the performance of your network in a simple and inexpensive way.1000BASE-T is an

Use the fat tree topology to effectively improve the performance of the Ethernet Switch

According to researchers at the University of California, San Diego, purchasing a faster switch may be the only way to improve the network performance of the entire data center. These researchers proposed this week a network architecture that enables commercialized Ethernet switches to provide better performance at a lower cost than 10-Gigabit Ethernet switches. Amin Vahdat, a professor of computer science

Ethernet switch development status quo

At present, the development of Ethernet switches is very rapid. Here we analyze the development status of Ethernet switches. MPLS switches follow the trend of combining ATM and IP addresses. Multiprotocol Label Switching (MPLS) is a tag exchange technique between Layer 2 and Layer 3. It is specially designed for IP addresses, the high-speed switching capability of the second layer can be combined with the f

Market development and future direction of Ethernet Switches

Ethernet switches are still commonly used. So I studied the market development and future directions of Ethernet switches. I would like to share with you here, hoping to help you. MPLS switches follow the trend of combining ATM and IP addresses. Multiprotocol Label Switching (MPLS) is a tag exchange technique between Layer 2 and Layer 3. It is specially designed for IP addresses, the high-speed switching ca

A thorough introduction to convenient installation of Gigabit Ethernet Switches

A comprehensive and thorough introduction to the convenient installation of Gigabit Ethernet switches, A friend recommended me to install several Gigabit Ethernet switches, do not know which Gigabit Ethernet switch is more suitable for me, I hope the majority of users will give me some suggestions, preferably those who have experienced Gigabit

Solution to the problem of no PHY found in MACB e000b000.ethernet:01

Use Petalinux 2017.1 to generate Zynq 7020 Linux Mirrors Problem phenomenon:1. Uboot Ethernet PHY rtl8211e works fine, but Linux cannot be found after startup eth02. Linux system startup prompt: MACB e000b000.ethernet:01 no PHY found Possible causes of the problem: Cadence MACB Linux Driver is not compiled into the kernel.Workaround: Configure the kernel to Cadence MACB Linux DriverPosition:-> Device Driver

Ethernet switch purchasing skills and principles

There are many things worth learning about Ethernet switches. Here we mainly introduce the Ethernet switch purchasing techniques and principles. Currently, Ethernet switches use three packet exchange modes: pass-through, storage-forward, and fragment isolation when transmitting data packets from the source and destination ports. 1. pass-through switching An

Does Metro Ethernet coexist with traditional WAN services?

Many enterprises now have their own Metro Ethernet services. Here we will give you an analysis of the coexistence of Metro Ethernet and traditional WAN services, South Korea's Enterprise Networks Company (formerly GNG Networks) an Optical Transport MAN (MAN) is being built along the subway lines in six major South Korean cities (including Seoul) and plans to provide Metro

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