1. WLAN(stands for wireless LANs)
uses radio waves to connect devices such as laptops to the Internet and to your business network and applications
They use a wireless Ethernet bridge converts a wired Ethernet device for use on a wireless computer network.
they use 1GB of Ethernet .
The company they use Nortel wireless technology, Nortel Networks Corporation, formerly known as Northern Telecom Limited and sometimes known simply as Nortel,

2. Data transmission
SLFE Company using different kinds of Data transmission, digital transmission, or digital communications is the physical transfer of data .
Data transmission is a subset of the field of data communications, which also includes computer networking or computer communication applications and networking protocols.
Is the company they rely on fiber optic cables and UTP/C cables for transmitting data also transmit data wirelessly through the Ethernet.

3. Types of Applications
In SLFE Company they rely on Microsoft SQL server and Microsoft Dynamics GP for applications
Microsoft SQL Server continues as the database used by the company. Is a standard programming language for retrieving information from and updating databases .and enables user to select, insert, update, and delete data from database

4. Types of Applications Microsoft Dynamics GP (formerly Great Plains)
it is software that delivers comprehensive out-of-the-box business management functionality, from operations management and financial management to human resource management and manufacturing.
helps them to grow and manage them distribution business better through:
improve operational efficiency
save time
reduce costs by transforming time-consuming manual processes into automated tasks that can be executed quickly and accurately.

5. Network security
involves the authorization of access to data in a network, which is controlled by the network administrator.
Users choose or are assigned an ID and password or other authenticating information that allows them access to information and programs within their authority.
In AL-fayez Company they have a very good security system where they use a Nortel secure router

6. The Nortel Secure Router 3120 is a powerful modular system that converges routing, security and multimedia traffic forwarding in a single cost-effective platform for enterprises.
makes the Secure Router 3120 ideal for high-speed Internet access, private line WAN connectivity, IP Telephony and multimedia, IPsec VPN, stateful firewall or data backup applications. Comprehensive

7. Network security They also use Juniper firewall system
is a vendor or manufacturer of Firewall appliances.
A firewall is a set of related programs, located at a network gateway server that protects the resources of a private network from users from other networks.
An enterprise with an intranet that allows its workers access to the wider Internet installs a firewall to prevent outsiders from accessing its own private data resources and for controlling what outside resources its own users have access to.

8. Conclusion
SNV-Lavlin is one of the leading engineering and construction groups in the world and has offices across Canada and in other 40 countries around the world.
The company as mentioned above provides different consulting and designs to different companies such as Aramco and SATROP, thus it shares its servers with them.
Finally SLFE Company will improve the weakness in company .such as will improve to use another types of topology
But and there is a list of strength that we have found in company. the security in the company is noticeably high since they use a very good back up system and they use juniper switch and firewalls which provide secure network to the company