Advantages of WAN are :
- It covers large geographical area therefore networks can be
made between long distances.
- Everyone on that network can access the same data. This avoids
problems where some users may have older information than
others.
- Different peripherals can be shared with all the computers in
the network.
- Shares software and resources with connecting
workstations.
Disadvantage of WAN are :
- Setting up the network could be expensive.
- Maintaining a network is a full-time job which requires network
supervisors and technicians to be employed.
- Security is a real issue when many different people have the
ability to use information from other computers.
- Protection against hackers and viruses adds more complexity and
expense.
- Need a good firewall to restrict outsiders from entering and
disrupting the network .
There are a number of main threats that exist to wireless LANS,
these include:
- Rogue Access Points/Ad-Hoc Networks
- Denial of Service
- Configuration Problems (Mis-Configurations/Incomplete
Configurations)
- Passive Capturing