1. Introduction
SNC-Lavalin Fayez Engineering Company is one of the leading engineering and construction groups in the world
SNC-Lavalin Fayez Engineering Company is engineering consultancy joint venture between SNC-Lavin and its local partners
SLFE was formed partly in response to Saudi Aramco’s General Engineering service Plus
Projects will include:
on and offshore oil and gas production
processing facilities infrastructure projects
-refining and petrochemical facilities.

2. Network infrastructure
1- eight floors, 600 computers
2- connected in server-client connection
3- All the computers of each floor are connected together using switches
4- switches connected to access points to the Nortel WLAN.
5- the access points are connected to a core servers and switch using the primary and secondary cables
6- the last floor there is an IP Tel switch
7- the core switches and the IP Tel switch is connected with the secure router and juniper firewall switch using UTP/C cable.

3. Cables fiber optic cables:
is a flexible, transparent fiber made of glass transmit light between the two ends of the fiber.
- A UTP/ copper caber link:
unshielded copper cable link that is a cable made of pairs of copper wires that are twisted around each other
Purpose:
canceling out electromagnetic interference from external sources.
found in many Ethernet networks and telephone systems
The switches also included

4. IP Telephony switch
uses the internet protocol (IP) to transmit voice or fax traffic
high quality voice communications
requires sufficient bandwidth to ensure transmission delay is minimized
cost saving to by eliminating the need for long distance charges
provide enhanced service levels to companies using the internet for commerce or service application.
->This technology brings a lot of benefits to AL-Fayez Company since they have offshore servers and are connected with many different networks in the region.

5. Switch and Router
switch is a small hardware device that joins multiple computers together within one LAN Technically, network switches operate at layer two (Data Link Layer) of the OSI model On the other hand, a router is a device that forwards data packets along networks
A router is connected to at least two networks, commonly two LANs or WANS or a LAN and its ISPs network. Routers are located at gateways, the places where two or more networks connect.

6. SATROP and SA secure router and a Juniber firewall
secure router and a switch

7. Strengths The type of cabling used in this company is extraordinary.
The company uses WLAN instead of usual wired LAN.
Security in the company is noticeably high
The company doesn’t use hubs which are poor kind of connectivity devices instead they use access points.
They use also Cisco backbone system and Nortel Ethernet technology.

8. Weaknesses
Although using fiber optic cables and UTP/C cables is a strength to the company it can also be some kind of weakness since it is highly expensive
The company only uses Bus topology
The servers are stored in rooms that has windows and maybe it would be better to not use windows to prevent sun of rain to come in the servers room and it would provide better conditions to it.