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 to connect vswitches: Stack and cascade.
1. GBIC and SFP
1) GBIC
Cisco GBICGigaStack Gigabit Interface Converter) is a common and low-cost Gigabit Ethernet stack module that pro
Some cisco switch modules organize the TwinGig Converter Module of the Catalyst 3750-E Series Switch: www.2cto.com TwinGig SFP converter can convert the 10 thousand M Ethernet X2 interface into two Gigabit Ethernet Small pluggable (SFP) ports. XENPAK uplink modules of Catalyst 3750G series switches: common optical modules of Ethernet switches include SFP, GBIC, X
vc709e Enhanced Xilinx Vertex-7 FPGA V7 xc7vx690t PCIeX8 interface card based on FMC interface
first, the Board of Cards overviewBased on Xilinx's FPGA xc7vx690t-ffg1761i chip, the board supports FMC connectors with PCIeX8, 64bit DDR3 capacity 2GBYTE,HPC, Board supports a variety of interface inputs, and software supports Windows.second, functional and technical indicators:1, Standard PCI-E interface, support PCI-E 8x, support PCI-E 3.0.2, the standard FMC-HPC interface, the Vadj le
: 408gbit/sec:24 Port x8.5 gbit/sec ( line rate ) x2 ( full duplex ). maximum fabric delay : 8 gbit/sec rate with no contention, pass-through routing for NanoMaximum frame : 2112 bytes Net load. frame buffering : You can dynamically allocate a frame of up to 484 frames per port . service levels : Class2,Class 3,andclass F ( inter-switch frames ). Port type : Fl_port,f_port,m_port ( Mirror Port ) and E_port; self-discovery based on switch type (U_port); Optional port type control in Brocade Acce
switch is a gigabit switch (all interfaces are gigabit)TT: Indicates that the gigabit on-connection port of the switch is base-t (i.e.: RJ45 interface)TC: Indicates that the switch gigabit on the port is dual-use, directly with the BASE-T, you can add modules on it.TS: Indicates that the 37 switch also has a gigabit expansion slot.T: Indicates that the 37 switch does not have a gigabit expansion slot.E: Indicates that the switch is an enhanced three layer; S: Indicates that it is a standard thr
Cisco mds9222i Fibre Switch most commonly used debug commands1. Check the switch portShow interface [Interface-range]View specified port run status, WWN information, configuration parameters, and packet statistics.Demonstration:mds9222i-1# Show Interface FC1/1FC1/1 is trunking-port FC1/1 operating normally, is a TE portHardware is Fibre Channel, SFP was short wave laser w/o OFC (SN)-Port, SFP hardware infor
|+------------------+ Memory high end
When a function call occurs in a program, the computer does the following: First, the parameters are pressed into the stack;The contents of the Save instruction Register (IP) are returned address (RET); The third is the base address that is sent to the stack(FP), then copy the current stack pointer (SP) to the FP as the new base address, and finally the localAmount of space, the SP minus the appropriate value. Take the following procedure as an example:
in the flow control statement, we use the Shell to run one or more commands based on the results of the condition test. You can use the if statement to test one or more conditional statements , or you can use the switch statement, a section that discusses how to use a flow-control statementLet's take a look at the exampleFirst I create a variable that can be used for condition checking:when using a if statement, if you are using a keyword that performs a condition check, the script block is exec
Some knowledge about storageAccording to the different transmission protocols, the network card can be divided into three kinds, one is the Ethernet card, the second is the FC network card, the third is the iSCSI network card.
Ethernet Card: The Scientific name Ethernet Adapter, the transmission protocol for the IP protocol, generally via fiber optic cable or twisted pair with Ethernet switch connection. The interface types are divided into optical and electrical ports. Optical ports ar
, thus forming a network of hardware devices.
So, the fiber-optic network card is the name in the end is the fiber port HBA card?
In fact, the fiber-optic network card that you often refer to is the HBA card in the Fibre Channel networks.
Because of the different transmission protocol, the network card can be divided into three kinds, one is Ethernet cards, the other is FC network card, the third is iSCSI network card.
• Ethernet Card: Scientific name Ethernet Adapter, transport protocol fo
download speed: Download speed = data Bytes/Response time 1.3.2 Response time
Response time = time of delivery (data bits/bandwidth) + propagation time (propagation distance/propagation speed) + processing time
The sending time needs to compute the sending time of each data forwarding cost between the two hosts, and the total sending time is the sum of the time spent on the forwarding.
The propagation time is mainly dependent on the propagation distance, because the propagation speed can approx
The maximum rate of Ethernet switch stack is faster, Which is multiple times faster than the port rate of the switch. Not all switches support Ethernet switch stack, 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 to connect a vswitch: Ethernet switch stack and cascade.
is damaged again.Add ESP, [esp] // use [esp] to reference K to implement ESP + k to calculate the true ESP ValueSubesp, 4 // 4 bytes in advance, that is, the retaddr location. Use ret to returnRET}
5. Demonstrate remote scoket reuse shellcode overflow Test Service
4. Analysis1. Review Win2k's system file integrity protection mechanism (SFP)Our main objective of webshells and Trojans is to modify and run privileged services and system files. However,
system Reserved Partition Introduction edit "system reserved" PartitionWindows VISTA/7 for security reasons, in the case of a newly installed Windows VISTA/7 System, if you use the disc partition tool to partition the hard disk, the system defaults to a portion (100-200m) of the space, do not assign the drive letter (you see under the system such as C, D, E ... To hold the system boot file (a portion of the file that needs to be read first when the computer starts). In general,
This post was last edited by xq_blessing on 2012-06-25 09:01:11
Title, video sites want to realize the user to share their own video (size control within 1G).
Directly on the code is more grateful ~
Reply to discussion (solution)
Php+flash Upload
Just like the Youku video upload, how is it done?
Upload_max_filesize and Post_max_sizehttp://www.howareyou.org.cn/?p=162
Change the relevant parameters of the php.ini, PHP 2G or within the file can be
I don't know what kind of station the la
that there is no upstream interface; this bit is not allowed by the new product)G, indicating the upstream GBIC interface;P indicates the upstream SFP interface;T, indicating the upstream RJ45 interface;V indicates the upstream VDSL interface;W indicates that the WAN interface can be configured on the uplink;C, indicating that the upstream interface is optional;M, indicating that the uplink interface is a Multimode Optical port;S indicates that the u
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