Data center & wireless LAN

Presented byJ.Jency

The data center is the department in an enterprise that houses and maintains back-end information technology (IT) systems and data stores—its mainframes, servers and databases.

DATA CENTER

Hardware installation and maintenance

Managed power distribution

Backup power systems

Data backup and archiving

Managed load balancing

Controlled Internet access

Managed e-mail and messaging

Managed user authentication  and authorization

Services Provided by Data center:

Network infrastructure:

Data centers contain a set of routers and switches that transport traffic between the servers and to the outside world.

Some of the servers at the data center are used for running the basic Internet and intranet

Network security elements: firewalls,  VPN gateways,  intrusion detection systems, etc.

Cont..,

Alcatel-Lucent 7750 Service Router:

Cont..,

7750 SR is an industry leading multiservice edge router.

Designed for the concurrent delivery of advanced residential, business and mobile services on a common IP edge platform.

Broadband Network Gateway for residential service delivery with advanced subscriber management.

Multiservice Edge Router for business networking services.

Aggregation Router for mobile networks. Mobile gateway for the mobile packet core (2G& 3G)

and WLAN gateway for Wi-Fi networks. Security Gateway (SeGW) for macro and small cell

mobile networks.

Functions of 7750 SR :

Lowest power consumption per bit transported. Highly reliable ‘non-stop’ services capability for

mission-critical applications Protects customers from security threats and Internet

attacks

Benefits:

A wireless local area network(LAN) is a flexible data communications system implemented as an extension to, or as an alternative for, a wired LAN.

Using radio frequency (RF) technology, wireless LANs transmit and receive data over the air, minimizing the need for wired connections.

Thus, combining data connectivity with user mobility.

WIRELESS LAN

Physical Layer◦2.4G Hz (5.15-5.35GHz, 5.725-5.825GHz for

802.11a)◦The physical layer defines the modulation of radio

waves and the characteristics of the signal for transmission of data

MAC Layer MAC layer covers three functional areas:

◦ Authentication of system◦ data privacy◦ MSDU (MAC Service data unit) delivery

IEEE 802.11

Differences between IEEE 802.11?

IEEE 802.11

IEEE 802.11b

IEEE 802.11a

IEEE 802.11g

Frequency 2.4G Hz 2.4G Hz 5 G Hz 2.4G Hz

Transmission Rate

1~2 Mbps 1~11Mbps 6~54 Mbps 22~54Mbps

Modulation Technique

FHSS/DSSS

FHSS/DSSS

OFDM PBCC-22 +CCK-OFDM

Wireless LAN Architecture

The process of assembling the parts of computer hardware in computer networking is called as computer architecture

Designing The WLAN Layout• Peer-to-peer • Client & Access Point• Multiple Access Points

WLAN

Types of WLANS Infra structure mode. Ad hoc network mode Mixed network mode Components of Wireless Architecture Access point Clients Bridge 

Basic Service Set (BSS) Extended Service Set (ESS)

Pros & Cons of Wireless Internet Technology

Wireless internet provides super fast broadband speed with no wires and cables.

Lot of computers can be attached at the same time with the help of router.

Mobility supports productivity. The technology can be un predictable. There are large chances of disturbance of wireless

traffic and hacking up your connection. Your neighbor can steel your internet off by sharing

it and your connection becomes slowly hacked.

Primary role is to transfer packets from a set of input links to a set of output links.

Deal with heterogeneous link technologies.

participate in complex distributed algorithms.

Router:

A generic router has four components Input ports : point of attachment for a physical link and

is the point of entry for incoming packets.Output ports : An output port stores packets and

schedules them for service on an output link.Switching fabric : The switching fabric interconnects

input ports with output ports.Routing processor : the routing processor participates

in routing protocols and creates a forwarding table that is used in packet forwarding.

The Cisco 2000 Series Connected Grid Router is designed specifically for the harsh, rugged environments.

Built to help ensure a highly secure, reliable, and scalable infrastructure.

The Cisco 2000 Series provides industry-leading routing capabilities.

Cisco 2000 Series Connected Grid Routers

Cisco 2000 Series, is an ideal platform to support the communications requirements.

This product has been extensively tested and is KEMA-certified to meet challenging substation compliance standards, including IEEE 1613 and IEC 61850-3.

Cisco IOS Software delivers the benefits of integrated security for NERC/CIP compliance, quality of service, and network management.

Enhanced Security and Reliability

Rugged industrial design and substation compliance with IEC-61850-3 and IEEE 1613 for utility substation environments.

Integrated security to help utilities address compliance with critical infrastructure

High-availability design for optimum network up time and redundancy

Features and Capabilities

Network and device management tools for deployments, upgrades, and remote monitoring.

Advanced quality of service (QoS) capabilities to support mission-critical substation communications such as Supervisory Control and Data Acquisition (SCADA).

Cont..,

Continuous operating temperature range from -40°C to +60°C

Support for a low-voltage DC power supply (24-60 VDC) and a high-voltage AC/DC power supply (88-300 VDC, 85-264 VAC)

Hot-swappable, fully redundant power supplies

Specifications-at-a-Glance

Rack height of two-rack units (2 RU)

Support for a series of WAN connectivity options using Grid Router WAN Interface Cards (GRWICs)

Cont…,

A network switch is a small hardware device that joins multiple computers together within one local area network (LAN).

Network switches operate at layer two. Network switches are capable of inspecting data

packets as they are received, determining the source and destination device of each packet, and forwarding them appropriately.

Switch

The new Ericsson-LG iPECS ES-3000/3000G is a family of fully managed Layer 2 switches.

support enterprise-class Layer 2 switching features including advanced QoS and security.

The IPECS ES-3000 series comes in 8 models from Fast Ethernet to Gigabit Ethernet.

IPECS ES-3000 SERIES

Easy to Install. Smart Management. Green Ethernet. VoIP and UC Friendly. Advanced Built-in Security. Enterprise-class Layer 2 Switching with advanced

features.

Features