3com 4500

by hardware at high speed and is suitable for busy high-speed LAN environments. Generally, the Catalyst 4500 and Catalyst 6500 switches deployed on the core and distribution layers support hardware-based Netflow. Therefore, Netflow cannot perform in-depth analysis on data packets, but it has enough information to detect suspicious traffic and is not limited by the "0 day. If properly analyzed and utilized, Netflow records are very suitable for early

specify a spacer, you can use-K to specify the number of columns.Sort 2 -t:facebook.txtapple::2.5Orange:3.4 Banana:5.5pear:2.3We use the colon as the spacer, and we sort the numbers in ascending order for the second column, and the result is very satisfying.The-F option for 2.7sort-F converts lowercase letters to uppercase for comparison, i.e. ignores caseExtension of the-t and-K options for 2.8sortThe source files are:Cat a 4500The first domain is the company name, the second field is the n

follows: $ Str = "$". "age = \" 28 \ "; \ r \ n "; In the above formula, print the variable $ str to get the expected effect. In the code, $ and age must be separated and used with the connection number (.) combine it to get the effect of $ age. the symbol (\ ") indicates a small double quotation mark ("); the end of a php code line must contain a semicolon (;); \ r \ n indicates to press enter to start another line. The above solves the php code start character, end character, code variable

, 3550, 4500, and 6500 series switches. solution 2-MAC address-based extended access list Switch (config) mac access-list extended MAC10 # define a MAC address access control list and name the list MAC10 (Reprinted with the source n et130) Switch (config) permit host 0009.6bc4.d4bf any # A host with the MAC address 0009.6bc4.d4bf can access any host Switch (config) permit any host 0009.6bc4.d4bf # define that all hosts can access the host Switch (conf

By carefully observing the intercepted Httptunnel packets, you can see that the first packet that followed the three handshake was a post action that was sent by HTC (client side) to the HTS (server side). As follows: 14:55:39.128908 client.yiming.com.51767 > Server.yiming.com.80:s 3521931836:3521931836 (0) win 8760 (DF) 0x0000 4500 002c d3cc 4000 fb06 53c9 xxxx xxxx E.,.. @... S.. f.# 0x0010 yyyy yyyy ca37 0050 d1ec 6a3c 0000 0000. f.d.7.p. J0x0020 6

0012.3f82.1b22 ip arp inspection filter static-arp VLAN 201 To configure the effect after Dai: Because Dai checks the IP and Mac correspondence in the DHCP snooping binding table, the Man-in-the-middle attack cannot be implemented and the attack tool fails. The following table provides a switch warning for implementing a man-in-the-middle attack: Copy Code code as follows: 3w0d:%sw_dai-4-dhcp_snooping_deny:1 Invalid ARPs (Req) on FA5/16, VLAN 1. ([000b.db1d.6ccd/19

forwarding server. After the installation of the test to see Winmydns is not normal work, the following tests: 1. Use the netstat command to see if DNS is working on UDP 53 ports Use the netstat command to check whether Port 53 is open: Start-> run->cmd.exe and then enter Netstat-an-p UDP as follows: C:\Documents and Settings\administrator>netstat-an-p UDP Active connections Proto Local Address Foreign UDP 0.0.0.0:445 *:* UDP 0.0.0.0:1434 *:* UDP 0.0.0.0:3456 *:* UDP 127.0.0.1:1046 *:* UDP 127.

1. Foreword The configuration register is a 16-bit virtual register that specifies the order in which to start the router, interrupt parameters, and set the console baud rate. The value of the register is usually expressed in hexadecimal. The configuration Command Config register allows you to change the value of the configuration register. 2. Start Order Configure the last 4 bits of the register, specifying the location of the boot file that the router must use when it starts: R>l 0x0000 d

the bound hostNote:The above command sets a port on the switch to bind a specific MAC address, so that only this host can use the network, if the NIC of the host is changed or another PC wants to use the network via this port, it will not be available unless the MAC address bound to the port is deleted or modified.Note:The preceding functions are applicable to Cisco 2950, 3550, 4500, and 6500 series switches.2. solution 2-Expanded access list based o

The introduction of vlan of a Huawei switch and three VMPS modes. In the explanation of vlan of a Huawei switch, there are three VMPS modes (but User Registration Tool, namely URT, only supports open mode ). How to configure dynamic vlan and VMPS of a CATALYST 4500 series switch? This article takes cisco ios 12.2 (31) SGA as an example. 1. Introduction to VMPS: VMPS is short for the Huawei vlanMembership Policy Server. as its name implies, it is a cen

)# Delete the MAC address of the bound host Note: The preceding command sets a port on the vswitch to bind a specific MAC address so that only the host can use the network, if the NIC of the host is changed or another PC wants to use the network via this port, it will not be available unless the MAC address bound to the port is deleted or modified. Note: The above functions are applicable to Cisco 2950, 3550, 4500, and 6500 series switches. 2. solutio

This article discusses how to use PDB to debug Python without convenient ide tools. Program Source code example For example, there is a program to simulate tax calculation :#! /Usr/bin/Python Def debug_demo (VAL ): If Val Print "Level 1"Print 0Elif Val Print "Level 2"Print (Val-1600) * 0.05Elif Val Print "Level 3"Print (Val-3500) * 0.10 + (3500-1600) * 0.05Else:Print "Level 4"Print (Val-6500) * 0.20 + (6500-3500) * 0.10 + (3500-1600) * 0.05#~ Def debug_demoIf _ name _ = "_ main __":The debug_

average salary of all employees without changing the query results of the preceding statement. What should I do? It is difficult to query using common SQL statements, but using OLAP functions is very simple, as shown in the following SQL: Select Row_number () over () as serial number, Row_number () over (partition by dept order by salary) as department number, Name as name, Dept as department, Salary as salary, AVG (salary) over (partition by dept) as average salary, AVG (salary) over

scenario: P1 and P2 are located on each selfish network, each with its own NAT/FW, And the NAT/FW deployed by the ISP exists, this is a typical multi-layer NAT/FW situation. NA and NB indicate the NAT/FW of P1 and P2 respectively, and NC indicates the NAT/FW of ISP. In this case, for P1 and P2, there are three different IP addresses and ports. See table 1.Table 1 three different IP addresses/ports of P1 and P2IP address/port \ node P1, P2 P1 P2Private Network Address/port 10.0.0.1: 4321 10.1.1.

Socket Communication Process Define variable -- get Winsock version -- load Winsock database -- initialize -- create socket -- set socket options -- close socket -- uninstall Winsock database -- release all resourcesThe entire program architecture is divided into two parts: the Server Client.Server socket program processSocket () → BIND () → listen → accept () → Recv ()/send () → closesocket ()Client:Socket → connect () → send ()/Recv () → closesocket ()Server code:# Include # Pragma co

Take the Cisco 2950 vswitch as an example. log on to the vswitch and enter the management password to enter the configuration mode. Then, run the following command: Switch # config Terminal # Enter the Configuration Mode Switch (config) # interface fastethernet 0/1 # Enter the specific port configuration mode Switch (config-If) # switchport port-secruity # Configure port security mode Switch (config-If) switchport port-security Mac-address MAC (MAC address of the host) (Config-If) No switchport

security level, the security of Cisco routers is not higher than that of soft routers. Cisco uses Nat in the pix, which is basically the same as using NAT in its own IOS. Even so, Cisco routers are doing well in resisting DoS attacks, mainly because Cisco's IOS is not only an operating system, but also a routing/security software. This integration method is not only more concise than the software routing products that work on windows, but also enables fast updates whenever Cisco discovers a new

you still concerned about these things?Me: I often read some work books. Because my friends in my teenage years are on the assembly line and go back every year for the Chinese New Year, I hope I can have more common languages with them and understand their lives.Interviewer: Well, what is your expected monthly salary? Before tax? Don't eat.A: 4500 to 5500B: 3800 to 4500C: 4500 to 5500 Me: 4000 to

How to take up the rounding up to 500 increments Conditions: With 500 progression, Rule: If it is now 4200, then automatically make it 4500, if it is now 4700, then become 5000;4500 or 5000 this same, please ------to solve the idea---------------------- $d = Array (4200, 4700, 5000, 4500);foreach ($d as $v) { printf ("%d:%d\n", $v, Ceil ($v/500) *500);} 4,200:4,5004,700:5,0005,000:5,0004,500:4,500 ----

IntroducedWe have developed a tax calculator, after entering the salary, printing the tax payable.A tax calculation formula: Taxable income = Salary amount-Various social insurance costs-starting point (3500 yuan) Taxable amount = Taxable income x tax Rate-Calculator deduction Each of the social insurance costs we set in this procedure is 0, do not consider.The tax rate and the Calculator deduction number corresponding table: Taxable Income amount Tax r