Download Network LANScape

Network LANscape
Servers & Equipment Found
In a Typical Local Area Network
(LAN)
By George Squillace
New Horizons of Michigan
MCT, MCSE, MCDBA
MCITP – Database Administration
MCITP – Enterprise Messaging
Building Blocks of a Typical
LAN
Application Servers
Infrastructure Servers
Infrastructure Equipment
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Infrastructure
Equipment – Part I of
III
Switches
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Switches replace Hubs
Hubs receive a transmission in one port and retransmit out all other ports
Connect Local Machines on the same “street”
Many available brands
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Can vary in size and complexity
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Cisco is a popular brand
Small
Large, Enterprise Hubs
The elaborate switches require programming, which requires training
Switches use hardware, or physical addresses
Switches still forward broadcast transmissions out every port!
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Routers
• Comparison:
• Switches connect machines on the same “street”
• Routers connect segments (think one “street” to another)
• Manufacturers
• Cisco
• Windows
• Many Other Vendors
• Routers can be very complex and require programming,
which requires training
• Enterprise Hubs can combine routing and switching
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Firewall (Routers)
• A device (specialty router) that selectively
permits traffic across its connected networks
• Many available brands
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Cisco PIX
Microsoft ISA Server 2006
CheckPoint
Watchguard
SonicWall
• Can be very elaborate and successful
implementation often requires training
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WAN Connections
• Provides a connection to a distant,
external network
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ISP Connections
• Provides a connection to an Internet
Service Provider
• Other services often are added beyond
merely providing a pathway to the Internet,
such as mail services
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Network Diagram
Router
Network
Printer
Private
Connection
to Branch Office
Switch
Router
Switch
Firewall &
VPN Srvr
Switch
ISP
& the Internet
Web Srvr/
SharePoint
File Srvr
Directory
Srvr
DHCP
DNS
WINS
Infrastructure
Servers
Blackberry
Srvr
Mail Srvr
CRM
and/or
Database ERP
Srvr
Application Servers
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Infrastructure Servers
– Part II of III
Protocol & TCP/IP Basics
• Before network entities can communicate they
require a common network protocol suite
• Virtually the only LAN protocol suite today is the
TCP/IP suite (Transmission Control
Protocol/Internet Protocol)
• TCP/IP is a complex protocol family and requires
a fair amount of knowledge to implement
successfully
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DHCP Servers
(Dynamic Host Configuration Protocol)
• A service that provides IP Addresses to
machines as they connect to the network
• No machine on a TCP/IP network can
communicate with other machines unless
it has a unique IP Address
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Directory Servers
(a.k.a. Authentication Servers)
• Servers must exist in the network that validate
identity of users, computers, and services
• For Microsoft networks, Active Directory Domain
Controllers
• For NetWare networks, eDirectory Servers
• In Unix, NIS Server (Network Information System)
• Multiple Directory Servers may exist in the
network to provide redundancy
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Name Resolution Servers
• On TCP/IP networks computers use IP Addresses to
connect to other computers and devices
• But humans use friendly names to refer to computers
(see example below)
Used to point friendly names to IP Addresses
• Examples of Name servers
• DNS
(Domain Name System)
• WINS
(Windows Internet
Name Service)
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Remote Access Servers
• Use for connecting someone on the outside of a corporate network
to enable access of internal resources such as File Servers and
electronic mail
• Examples
• Most firewalls also provide this capability
• RRAS (Microsoft Routing & Remote Access)
• Virtual Private Networks (VPNs) extend remote access and encrypt
the pathway between the client machine and the remote access
server
• Providers of remote virtual desktops, which is an alternae or
additional remote access technology
• Terminal Services
• Citrix Server
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File Servers
• Use to store corporate/organization
documents and work
• Must be secured
• Must be organized and maintained
• New folders created
• Permissions changed
• Old data removed or migrated
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Application Servers –
Part III of III
Mail Servers
• Exchange
• GroupWise
• Internet Service Providers may provide:
• SMTP (Simple Mail Transport Protocol)
{outbound} + POP3 (Post Office Protocol)
{inbound}
• SMTP (Simple Mail Transport Protocol)
{outbound} + IMAP4 (Internet Message
Access Protocol) {inbound}
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Database Servers
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Microsoft SQL Server
Oracle
DB2 (IBM)
Informix
Sybase
OpenSource options
• MySQL
• PostgreSQL
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Web (HTTP) Servers
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Apache
Windows (IIS)
NetWare
SharePoint is a specialty web server/portal
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Telephony Servers
• PBX Integration
• Unified Messaging
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FAX Servers
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Instant Messaging Servers
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Network Diagram
Router
Network
Printer
Private
Connection
to Branch Office
Switch
Router
Switch
Firewall &
VPN Srvr
Switch
ISP
& the Internet
Web Srvr/
SharePoint
File Srvr
Directory
Srvr
DHCP
DNS
WINS
Infrastructure
Servers
Blackberry
Srvr
Mail Srvr
CRM
and/or
Database ERP
Srvr
Application Servers
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Network LANscape
Part II
Courses Applicable to Typical
Infrastructure Servers
& Application Servers
Primary
Infrastructure Equipment
{mostly Cisco} Courses
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INTRO to Cisco Networking Technologies
ICND, Interconnecting Cisco Network Devices
BSCI, Building Scalable Cisco Internetworks
BCMSN, Building Cisco Multi-Layer Switched Networks
SNPA, Securing Networks with PIX Firewall and ASA
Microsoft Course 2824B (for ISA Server 2004)
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Primary
Windows Server Courses for
Infrastructure Servers
• 2274, Managing a Windows Server 2003 Environment
• Directory Services management
• File Server Services
• 2275, Maintaining a Windows Server 2003 Environment
• 2276, Implementing a Windows Server 2003 Network Infrastructure:
Network Hosts
• TCP/IP Networking
• 2277, Implementing a Windows Server 2003 Network Infrastructure:
Network Services
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DCHP
DNS
WINS
Remote Access
• 2279, Planning, Implementing and Maintaining a Windows Server
2003 Active Directory Infrastructure
• Directory Services installation
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Primary
Microsoft Application Server Courses
• Exchange
• 2400C Administration (for Exchange 2003)
• SQL Server
• 2780B Database Administration
• 2779B Database Implementation
• BI and many, many other courses
• SharePoint
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2014
2552
2553
Several others
• SMS
• 2596
• BizTalk
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Resources
• Microsoft Learning website
• e-Squillace.com website
• e-Squillace.com TechReference home
• e-Squillace.com Diagrams
• Diagram, How Do Computers Find Services on the Network?
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