NWI FOR OLATUNDE ISMAILA (G10B)

NAMES: OLATUNDE ISMAILA

STUDENT ID: P1015927

PATHWAY: N.E.T.S

MODULE: NETWORKING INFRASTRUCTURE (NWI)

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Table of ContentsNETWORK PROTOCOLS AND INTERNET PROTOCOL....................................................................................4

Definition of Internet Protocol (IP)..........................................................................................................4

Main Diagram for the three branches.....................................................................................................5

London Branch Network Diagram...........................................................................................................6

IP address Scheme per Subnet................................................................................................................7

Manchester Branch Network Diagram....................................................................................................8

IP address scheme per Subnet.................................................................................................................8

Cardiff Branch Network Diagram.............................................................................................................9

IP address scheme per subnet.................................................................................................................9

Explaining the DHCP server...................................................................................................................10

DHCP configuration...............................................................................................................................11

Creating scopes options.........................................................................................................................14

DHCP relay agents.................................................................................................................................17

DHCP Relay Agent configuration...........................................................................................................17

Domain Name Strategy..........................................................................................................................21

Configuration of DNS Server..................................................................................................................22

Describing forward and reverse lookup zones.......................................................................................23

Forward and Reverse Lookup Zone configuration.................................................................................23

Delegate authority for zones.................................................................................................................25

Configuring appropriate resource records.............................................................................................27

NetBIOS Name Server............................................................................................................................29

Installation and Configuration of WINS Server......................................................................................30

Configuration of Push/pull replication partners....................................................................................31

Alternating Strategies for Automatic IP.................................................................................................32

Explaining the different IP addresses.....................................................................................................33

Computer Network Resolution..................................................................................................................34

Name resolution problems....................................................................................................................35

Diagnostic Tools.....................................................................................................................................36

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VIRTUAL PRIVATE NETWORK (VPN)...........................................................................................................38

Definition of VPN...................................................................................................................................38

Configuring VPN for Inbound and outbound.........................................................................................39

Computer Networks Security threats....................................................................................................41

Security for an organization’s network..................................................................................................43

C A for companies..................................................................................................................................44

Configuring IPSec...................................................................................................................................45

REFERENCES..........................................................................................................................................48

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NETWORK PROTOCOLS AND INTERNET PROTOCOL

Definition of Internet Protocol (IP) The internet protocol is in two versions today but the only difference that exists among them

is the bit range and the quality of service they offer. The internet protocol version 4 (IPv4) is

running out of space and could be replace by the internet protocol version 6 (IPv6) which we

believe will serve for a longer period of time compare to the IPv4.

Generally, the internet protocol (IP) can be defined as a set of communication principles that

ensure that data is transmitted from one device to another to be used by individuals or

organizations. When a network is design for an organization, it has to be configured using the

internet protocol so that each computer and device can have a means of sending data to the

other computers and devices. On the open system interconnection (OSI) model, the IP protocol

is at the network layer and at the internetwork layer on the TCP/IP suit.

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Main Diagram for the three branches

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The above network architecture is the main one that connects and controls all the three

branches which are: Manchester, London and the Cardiff branch office. The central control

point is at the London branch office but the I.T staffs have configured it in such a way that it is

easily controllable.

London Branch Network Diagram

The above network diagram is for the London branch office and it is made up of five (5)

departments and the server’s office and every department is structured and is a sub-network of

the main network architecture.

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IP address Scheme per Subnet This is the design internet protocol (IP) network of the London office and it is design using the class C IP address methodology and this branch office is compose of 100 staffs which are divided into all the departments as shown below;

Manchester Branch Network Diagram

This is the network diagram design for the Manchester branch office and the internet protocol (IP) network is design same as that of the London network architecture using the class C IP principles with each department having its own subnet.

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IP address scheme per Subnet The Manchester branch office also consist of 100 staffs divided up into four (4) departments with each sub-network having its own internet protocol (IP)address ranges.

Cardiff Branch Network Diagram

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IP address scheme per subnet Also design in the same ways as the above two networks and is design to serve the same

purpose.

Explaining the DHCP server The dynamic host control protocol (DHCP) is a protocol that is design to automatically assign

internet protocol addresses to client computers that are configure for DHCP services. The

dynamic host control protocol is only applicable on a network system that is designed with a

server as the central control point of the entire network. In designing and configuring a network

system for DHCP services, all the required parameters have to be configured such as;

Range of pool of the various IP addresses.

Subnet Mask

Network Gateway

Server address

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The DHCP server works as describe below;

DHCP configuration- From the server manager to the DHCP screen, the check box of the DHCP server is

checked.

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- Setting up the IPv4 DNS server

- Configuring DHCP scopes for the various departments.

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- Scopes successfully created for the various departments.

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Creating scopes options - Right-click on IPv4 to add new scopes to the network.

- Scope parameters for the network.

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- The new scope will expire within 8-days.

- Configuring new scopes and DHCP scope options.

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- The Domain, Server name and IP address and then configured.

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- Completing new DHCP scope configuration.

DHCP relay agents The dynamic host configuration protocol (DHCP) relay agent is known to be a computer or

router that when configured has the capabilities of listening to BOOTP broadcast form the

DHCP clients which then relay the data to the DHCP servers on different subnets.

DHCP Relay Agent configuration- Checking the check box of “Network Policy and Access Services” to begin installation

and configuration.

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- Configuring “Routing and Remote Access”.

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- Configuring for “Custom configuration”.

- Finalizing configuration.

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- Launching “Launch NPS” from Remote Access Logging and Policies.

- Configuring to allow access to Remote access users.

- Setting up network policy and type of network specification.

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- Clicking on the new option link – Groups.

Domain Name Strategy Domain name strategy in networking ensures the naming of computers in such a way that

they can easily be identified on a network. This naming strategy takes place by configuring the

various computers with the transmission control protocol and internet protocol (TCP/IP)

technology. Computers and other devices on the network can be located when these principles

are put in place. Hence, the domain name server (DNS) can also be configured to archive these

services as shown below.

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Configuration of DNS Server- Selecting the box of DNS server for configuration.

- After going through the installation processes, DNS server is successfully configured.

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Describing forward and reverse lookup zones In computer networking, forward zone is a feature that is configured for the translation of DNS

queries for external domain name server (DNS) names to the domain name system (DNS)

names and to the external DNS servers within a network. This configuration will be done from

the DNS server.

Then the reverse lookup zone is a feature that is required by the DNS server that has the

capability of supporting clients applications of the IP address when a name query and lookup a

computer that is based on the address of the computer.

Forward and Reverse Lookup Zone configuration- Right-clicking on forward lookup zones to configure a new zone.

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- Selecting for Primary Zone configuration.

- Creating and configuring new zone files.

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- Finalizing configuration.

Delegate authority for zones- Selecting @New Delegation” to configure the delegate authority zone.

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Configuring appropriate resource records- New host configuration process.

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- Entering the FQDN and the IP address parameters.

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NetBIOS Name Server In computer networking, network basic input and output services (NetBIOS) name resolution

is a feature on the Microsoft windows server that is applicable for identifying NetBIOS resource

on the network.

Hence, NetBIOS is a 16-bit unique identifier and it uses this identifier to identify resources on

the network that runs NetBIOS over TCP/IP. Resolving NetBIOS name resolution depends on

how the network is configured and what type of application that the NetBIOS is configure for.

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Installation and Configuration of WINS Server- The WINS server check box is selected for installation.

- Completing WINS server installation and configuration process.

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Configuration of Push/pull replication partners

- The internet protocol (IP) address of the WINS server is entered.

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- Below is the validity of the replication of the WINS server.

Alternating Strategies for Automatic IP In setting up a network, there might be an alternative to select and configure automatic

internet protocol (IP) address and on a routed network, the following are some of the address

scheme that can be considered.

Static Internet protocol address

APIPA address

Alternative IP address

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Explaining the different IP addresses

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Computer Network Resolution On every computer network, the network admin has to be ready with the available tools to ensure that the network is free from any fault as this might destabilize the state of the organization’s network and reduces productivity. There are a number of tools in software and hardware that helps in ensuring that the state of the network and the activities of the organization are in good shape. Some of the problems or faults that may destabilize a network are;

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Name resolution problems

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Diagnostic Tools As describe above, the table below shows a number of software diagnostic tools the can help in troubleshooting a faulty network and some can even detect when a fault has to occur.

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VIRTUAL PRIVATE NETWORK (VPN)

Definition of VPN The virtual private network (VPN) is a network system that allows one to access the network

as if he is physically located on the network. The virtual private network offers high secure

connections between private networks connections via the internet and this network has the

capability of allowing remote devices to make use of the network regardless of their locations.

Connection at each end of the user is known to be a VPN endpoint and the transmission link

between these endpoints is known to be a VPN tunnel.

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Configuring VPN for Inbound and outbound

- Enabling settings for custom configuration.

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- Checking the VPN check box for custom configuration.

- Configuration for RRAS and displaying the ports properties.

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Computer Networks Security threats As earlier describe above, there are lots of threats faced by modern computers and computer

networks and this attacks may be from human and some may occur due to malfunctions. There

are varieties of attacks but some of the most common once are as listed and explained above.

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Security for an organization’s network

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C A for companies Every company need a certificate of authority on its network and this certificate is an authority

on a network the issue and manage security credentials and public key infrastructure (PKI) and

it main purpose is to ensure that the internet functions and that there should be transparent

and trusted transactions during the online process.

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Configuring IPSec

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- Selecting for configuration for “Local Computers”.

- Selecting to create IP Security Policy.

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- Installing the IP security policy wizard.

- The installation of IP security policy wizard is completed.

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REFERENCES- Brown, Steven A. Implementing Virtual Private Networks. New York:

McGraw-Hill, 1999. Print.

- Bush, Patrick J. Introduction To TCP/IP Internetworking. Cincinnati: South-Western

Educational Pub., 2000. Print.

- Carmouche, James Henry. Ipsec Virtual Private Network Fundamentals. Indianapolis,

Ind.: Cisco Press, 2007. Print.

- Droms, Ralph, and Ted Lemon. The DHCP Handbook. Indianapolis, IN: Macmillan

Technical Pub., 1999. Print.

- Komar, Brian. Windows Server 2008 PKI And Certificate Security. Redmond, Wash.:

Microsoft Press, 2008. Print.

- Long, Cormac S. IP Network Design. New York: Osborne/McGraw-Hill, 2001. Print.

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