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Network equipment

netzwerktechnik
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Buy low-priced used network components

Would you like to expand your company network with low-cost equipment? Then you’ve come to the right place here. In our online shop, we offer a wide range of high-quality products from renowned manufacturers at affordable prices. In our vast assortment, you can find network or KVM switches as well as 19” TFT Consoles or accessories like switch modules, GBICs and parts of the cable management.

Devices with Infiniband technology are represented, as well as Fibre Channel or Ethernet models. Before shipping, the equipment will be tested carefully – so you can be sure that you’ll receive a perfectly functioning product. Our quality is as profitable for you as our lightning-fast shipping times. All articles that we offer in our shop are in stock and directly available. If there is a failure in your company network or if you’d like to expand this quickly and easily, we will ship the required article immediately. So, you can use it immediately on your premises without long waiting times.

Our competent sales team will be more than happy to assist you at any time if you have questions to our products, compatibilities or possible uses. Do not hesitate to contact us via email, chat, phone, or WhatsApp: https://www.servershop24.de/en/contact-us/


The network: a critical importance for your business


Every company is individual – and so are their requirements on the network. The IT landscape mainly consists of central units such as server and storage devices, personal computers, notebooks, smartphones, or tablets. The sharing of programmes, Internet access, printing services and the central data backup is provided via the network. Don’t forget that IT is not only used in offices these days. The constant access to the stored data or applications must be possible also for departments like warehouse or dispatch, for branch offices, the field staff and employees in home office.

Especially in exceptional situations – such as the beginning of the Corona crisis – many companies had to scale, change or completely renew their network quickly. Suddenly, smooth access to external resources became essential. This was the only way to prevent a standstill on the business operations without on-site employees. However, what the pandemic brought us in time-lapse was an upward trend already before: flexible working from home instead of physical presence in the office. For meetings, we mainly use the web and programmes like Microsoft Teams or Skype now. It’s an efficient way and more economically sustainable than business trips abroad. So, the corporate network must not only survive times of crises, but also be able to keep up with the dynamic spread of digitization.

Therefore: the IT infrastructure and the network should be planned and implemented with care – no matter if it’s a SME or a large company. Only a secured network, which is regularly maintained and optimized, can guarantee a smooth internal process and is protected from threats (for example hacker attacks).

It depends on the right hardware


Especially in the professional sector, the prices for high-performance and branded devices are very high. Furthermore, the licences for these products are expensive – but essential for using them (e.g., firewalls). A significantly better alternative is refurbished hardware. Similar to Servers, high-performance network components are designed for a long service life. Switches from the enterprise area have to provide an entirely different data flow and throughput than products from the home network area. They also have better features (for example PoE or manageability) and the number of possible connections is also higher.

There’s a variety of different network connections and transmission protocols. Each component has separate tasks that allow the communication between them:


Network switch

A switch usually has several ports on which you can connect data cables. It functioned as a connecting element for the individual network segments. The faster the throughput of the data packets, the better the performance of the wired network. The most common switching technology is based on Ethernet. But also technologies like Fibre Channel or Infiniband have proven their worth. Among other things, you can classify switches in “unmanaged” or “managed” versions. Unmanaged switches are normally used in private or SME networks because you don’t have to configure them (plug-and-play method). Larger installations that also require remote maintenance need the managed models. It’s not only because they’ve a faster response time: They also offer management functions and better security.


Router

While the switch only receives and forwards data packets inside the internal network, routers are suitable for transporting information to several locations. With them, a secure connection between the networks is enabled. The most frequent use of routers is to get a connection with the Internet. High-end switches (e.g., from HP or Cisco) not only contain switching or management modules in one chassis, but also high-class routing features (Cisco calls them “carrier-class routers”).


Firewall

The firewall is the part that should not be missing in a thoughtful network security system. Based on previously defined rules, it “recognizes” if a data packet is allowed to enter the network or not. So hacker attacks and the introduction of viruses can be prevented. Their function is based on software that can analyse and evaluate data. If the firewall detects a threat, this data flow will be automatically blocked.


KVM-Switches & 19” consoles

In contrast to the network switch, the KVM switch is used to control different computers with just one monitor, one mouse and one keyboard. They act as “switches” to combine the separate systems into  a control unit. The 19” or rack console serves as a compact unit to control the individual servers directly in the rack cabinet. It is also called a “rack mount console kit”, “TFT console” or “rack console drawer”.


GBIC / Transceiver

These converters are mainly used as interfaces for high-end networks (Ethernet or Fibre Channel). GBIC stands for Gigabit Interface Converter and means that the module can convert the type of the transmitted signal (e.g., electric currents to optical currents). This facilitates extreme flexibility and a higher network performance. A special shape of the GBIC is SFP – also called mini-GBIC. The Small Form Factor Pluggable version is much smaller than a normal GBIC module, but offers the same performance. The advantage of an SFP GBIC is that – due to compact design – twice as many modules can be attached to one power card.


Social engineering – the human security gap


Obvious security gaps can be covered with the right hardware – but human weaknesses can still give hackers access to sensitive company information. It’s not enough to rely on technology alone. Internet frauds cleverly steal data from the workforce. This is known as “social hacking” or “social engineering”.

It works like this: Cyber criminals systematically manipulate employees to get access to sensitive company data. Their trick is to scare the employee, asking them for help or a favour, or making a promise. The hackers obtain trust and use perfidious tricks like the “CEO fraud”. Here the employee receives a supposed prompt from a supervisor via email, who asks him for data, passwords, or other internal information. Only in rare cases, employees will oppose this and send the data to unauthorized persons.

But again: Check the sender address carefully! Is this really how you spell your colleague’s name, or is there an additional dot or hyphen in it? Only when employees can raise their awareness on the tricks of cybercriminals, they keep a cool head even in stressful situations.


Therefore, it’s important to clear up the staff about the tricks of the hackers. Even if the common attacks are executed via email – p. e. using certain particular techniques or harmful links and attachments – they happen not only “online”. Moreover, be careful when callers ask certain questions about the company. If you often receive visitors in your firm, pay attention to them. In no case should external persons be able to stay in the premises without guidance. Also keep critical documents and papers out of sight and inaccessible to third parties during meetings.