Internet and Intranet Management

A mature Intranet is

1. a stable and growing user base

2. a solid budget line

3. a workflow core

4. a series of self-service options

5. a group of essential applications

 

Developing an Intranet Site steps

1. Should we Implement?

Will the company benefit from intranet implementation

 

2. Do we need help?

Use internal resource or Outsourcing

 

3. Enlist User Support

a. Involve the user community;

b. Involve the executives;

c. Identify the grass root decision makers;

d. Communicate and feed information back to the community

e. Translate the medium to relate to business

 

4. Intranet Organisational Issues

Move away from rules and rigidity to openness and agility(flexibility)

Address openness, diversity and collaboration across groups

 

5. Technical Architecture

a. Research all the available options

b. Selection of communication technology

c. Bandwidth

d. Volume predictions and buffer for growth

 

6. Prototype(model)

a. Application that will be installed in short, medium and long term

b. Do not get bogged down(too much involved) in details

c. Choose a prototype(model)

 

7. Domain and IP Addressing

a. Internet Domain

b. Number of network segments

c. Number of hosts

 

8. Build and Finalise the Plans

a. By now the plan should be shaping up

b. Focus on longer range issue(migration, maintenance)

c. Time factors

d. Cost factors

e. Plan approval/Sign-off

 

9. Implement the Infrastructure

a. Execute the plans

b. Be aware of slow and bureaucratic processes

c. Solicit bids from suppliers

d. SLAs

 

10. Develop Applications

a. After implementation, design the Intranet applications

b. User involvement

c. Location-independent development

 

11. Implement Intranet

a. Information dissemination policy(centralised or decentralised)

b. Device mechanism for receiving suggestions

c. Conversion and Implementation Issues

 

12. Manage Intranet

Performance monitoring, network management and administration, backup and recovery

 

DNS (Domain Name System) database

root DNS server: 361

Top Level Domain(TLD)

 

Check the domain name information: http://whois.net/

 

DNS Server: work as database. also is an resolver

DNS Resolver: send enquiry to DNS server

 

Primary Zone: zone file can read and write

Secondary Zone: zone file only can be read

Synchronization: used to full synchronization --> now incremental zone transfer

 

Recursive and Iterative querie

Recursive: the answer is definate. yes or no

Iterative: the answer is best answer.

 

Figure 5.4 shows an example of iterative and recursive queries. This example assumes that none of the servers have the requested information in their caches.

Figure 5.4 Iterative and Recursive Queries
In the example shown in Figure 5.4, a client somewhere on the Internet needs the IP address of noam.reskit.com. The following events take place:

1. The client contacts NameServer1 with a recursive query for noam.reskit.com. The server must now return either the answer or an error message.
2. NameServer1 checks its cache and zones for the answer, but does not find it, so it contacts a server authoritative for the Internet (that is, a root server ) with an iterative query for noam.reskit.com.
3. The server at the root of the Internet does not know the answer, so it responds with a referral to a server authoritative for the .com domain.
4. NameServer1 contacts a server authoritative for the .com domain with an iterative query for noam.reskit.com.
5. The server authoritative for the .com domain does not know the exact answer, so it responds with a referral to a server authoritative for the reskit.com domain.
6. NameServer1 contacts the server authoritative for the reskit.com domain with an iterative query for noam.reskit.com.
7. The server authoritative for the reskit.com domain does know the answer. It responds with the requested IP address.
8. NameServer1 responds to the client query with the IP address for noam.reskit.com.

来源： <http://technet.microsoft.com/en-us/library/cc961401.aspx>

DHCP(Dynamic Host Configuration Protocol) Service

Network: how to calculate the number of network.

1. If there is only one router, check with the router. How many connection from router means how many networks there;

For example: there are 3 three network is the following diagram

 

 

2. If there is more than one router, beside the step 1 and check how many path connect the router.

For example: there are 8 network in the following diagram

 

Gateway: connect the different network