3com 4400

certain extent because the protocol standards are not yet mature and the implementation methods of different vendors are different. Principle 5: Prevent Network Attacks To ensure that the core switch is not affected by DoS attacks, some vendors adopt the anti-attack technology in the firewall and IDS System in the core route switch, to ensure that the core switch is more stable and strong. This can especially defend against attacks from inside the network and improve system security. However, t

This article is to introduce two very representative distributed firewall system at present. At present, some well-known foreign network equipment developers in the distributed firewall technology more advanced, the product performance is also relatively high, using the "Software + Hardware" form. Host firewall for the integration of distributed firewall technology hardware products, and firewall server is a software form to adapt to more flexible and high intelligence requirements, such as

CATV Broadband Integrated Information network based on 3COM company CATV Access Network platform is a successful implementation of cable TV, data communication and network telephone "three nets in one" on the 750MHz bandwidth fiber-optic coaxial hybrid network (HFC). The open television, telephone, computer line of the public Information network, the main technical indicators to reach the world's advanced level. Now, there are 35 sets of TV programs d

Currently, the mainstream Gigabit backbone switches have high forwarding capabilities and smaller sizes. They are suitable for common users. Among the six Ethernet switches we have tested, EDIMAX ES-5800R and LeaPComm6004 switch is not manageable switch, Accton es00008 and creative company Thinker3800 switch are network tube type switch, 3Com 4900 is support Layer 3 and Layer 4 switch, digital China D-Link DGS3308TG is a layer-3 switch. Performance fi

CD image created for the gateway mode and the other is a virtual machine file created for the standard mode. We can decide which file to download based on the purpose of using Strata guard. In this article, I need to use the free version of Strata guard as the gateway, so I will download its CD image file, it is about MB in size. Ii. wireless router configuration methods and hardware requirements Strata guard has high performance requirements on the dependent hardware, mainly to ensure sufficie

Of the six Ethernet switches we tested, the Edimax es-5800r and LeaPComm6004 switches are not managed switches, Accton ES4508, and the Thinker3800 switches of the creators are all network-management switches, 3Com 4900 is to support the three-layer and four-layer switch, Shenzhou digital D-link DGS3308TG is a three-tier switch. Performance is the brunt The 6 products include all copper ports, all fiber ports, and gbic ports, of which

At present, the construction of intelligent community has gradually become a hot topic, and the construction of data network will become an important part of intelligent community construction. At the same time, the intelligent and networked residential district will bring new market opportunities to the developers of the community. For intelligent community Construction, 3Com according to the different operating environment and user requirements, th

connected to the Internet for 24 hours. Telephone dial-up service usually assigns a new IP address to the user each time the user accesses the Internet, but the broadband service provider usually assigns a permanent fixed Internet address to each user, making it very easy for hackers to "lock down" their computers. 3Com Embedded firewall crystallization three minds 3Com Company to provide users with the in

stupid, how many different item shapes have to define a different creation function, I have been looking for an afternoon did not find a better way to pass the argument, first Just use this stupid method. Remember that there are several DS that need to write the corresponding item function, I'll just list Item03, I'm not going to tell you that I've piled up 24 to Item24 Code to copy the code as follows #!/usr/bin/env python #coding =utf-8 Import RRDtool def Item01 (Rrdname, Startstamp, DS

better way to pass the argument, firstJust use this stupid method. Remember that there are several DS that need to write the corresponding item function, I'll just list Item03, I'm not going to tell you that I've piled up 24 to Item24 The code is as follows Copy Code #!/usr/bin/env python#coding =utf-8Import RRDtooldef Item01 (Rrdname, Startstamp, DS):Rrdtool.create (rrdname, '--step ', ' o ', '--start ', Startstamp, Ds[0],' rra:average:0.5:1:3000 ',' Rra:ave

center to several major buildings, and connecting them to the secondary backbone nodes. The vswitch installed on the backbone network node is located at the second layer of the network. It is connected up to the backbone switch in the network center and down to the hub on each floor. The main bandwidth of the school campus network is 100 Mbps, And the upgrade to ATM or Gigabit Ethernet is considered. Level 3 is the HUB in the building, which is a Level 3 node. A three-level node is a LAN device

Article Title: RouterOS2.8 hardware driver list (1 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Device Driver List Document revision: 2.8 (Wed Oct 13 11:39:39 GMT 2004) Applies: MikroTik RouterOS V2.8 General Information Summary The document lists the drivers, included in MikroTik RouterOS and the devices that are tested to

The layer-3 forwarding capability is one of the most important performances of GE backbone switches. It not only improves the overall performance of the network, but also relieves network congestion in the case of network congestion. Our evaluation is mainly to measure the performance of the Gigabit backbone switch. At the same time, we also consider the functions of the switch through configuration and validation tests. Two of the Gigabit backbone switches we tested are capable of forwarding on

1. Loading and aging of large objects in the reserved area without PIN will cause fragments in the sharing pool. Oracle wants to solve this problem by creating a region in the sharing pool, 1. Loading and aging of large objects in the reserved area without PIN will cause fragments in the sharing pool. Oracle wants to solve this problem by creating a region in the sharing pool, I. Reserved Area Loading and aging of large objects without PIN will cause fragments in the sharing pool. Oracle wa

H3C routers have developed rapidly and are also very competitive in the market. Here we will introduce the performance of H3C router products in the market for your reference. Recently, the US-renowned media Network World has published its evaluation results on H3C router S7506E (3Com 7906E) to the outside World, h3C router S7506E scored a high score of 4.28 (out of 5) in the evaluation. This evaluation lasted for five months and involved H3C routers

ROLLUP will gradually remove a field on the right from the right to the left Based on the field following group by, and gradually sum up, CUBE sums all the combinations of fields after group. CUBE eg1: SELECT department_id, job_id, SUM (salary) FROM employees WHERE department_id Group by cube (job_id, department_id ); DEPARTMENT_ID JOB_ID SUM (SALARY) ---------------------------------- 211200 10 4400 20 19000 30 24900 40 6500 50 1564

Recently established in the lab's network environment, all host labs are connected via a switch. Want to be a gateway through the server (single card), using the Mentohust authentication extranet, and then other hosts in the intranet through this gateway to connect to the external network.1. First use mentohust on the server to connect to the extranet, and then enter the Ifconfig command at the terminal to view the acquired extranet IP:Eth0 Link encap: Ethernet Hardware address B8:AC:6F:D8

Conclusions1, the parameters associated with the shared pool are: shared_pool_size,shared_pool_reserved_size,_shared_pool_reserved_pct _shared_pool_reserved_min_alloc 2,shared_pool_reserved_size generally default is Shared_pool_size 5%, this ratio is controlled by the parameter _shared_pool_reserved_pct 3,_shared_pool_reserved_min_alloc controls the minimum allocation size in the reserved pool, with a default size of 4400 and a range of 4000bytes to 6

level products. Cisco and 3Com are still the leader in market share, Atrica, Extreme, foundry and Nortel have also introduced technology-leading and performance-friendly products, and Intel and other manufacturers have introduced low-end but superior performance products. Huawei introduced the S8016-type high-end routing switch in 2001, with a back-panel capacity of up to 256Gbps. The products of each section flourish Cisco offers a Catalyst series

level products. Cisco and 3Com are still the leader in market share, Atrica, Extreme, foundry and Nortel have also introduced technology-leading and performance-friendly products, and Intel and other manufacturers have introduced low-end but superior performance products. Huawei introduced the S8016-type high-end routing switch in 2001, with a back-panel capacity of up to 256Gbps. The products of each section flourish Cisco offers a Catalyst series