Network vs Analog
Pros of analog cameras
Lower cost -- Analog cameras generally cost less to purchase than IP cameras.
Greater flexibility of design -- Analog cameras often come in a larger variety of designs such as mini covert cameras to large PTZ models. If you have unique surveillance needs you may find it easier to find the style of camera you need in an analog model.
Superior compatibility -- It is much easier to mix and match cameras and brands if you use analog versions. This can make it easier if you already have existing camera equipment that you wish to incorporate into your surveillance system.
Cons of analog cameras
Lack certain features -- Many of the basic analog cameras often lack some of the more advance features such as digital zoom.
Potential interference problems -- If you are installing a wireless surveillance system, analog systems can have interference problems. More importantly, the resulting signals cannot be encrypted. This can potentially mean that someone else can view the signal.
Long distance applications are more difficult -- If your surveillance needs encompass a wide area, analog cameras may not be your best choice.
Analog cameras generally do not accommodate big distances, and getting them to work over broad ranges can be difficult.
Pros of IP cameras
Better wireless reception -- IP cameras have encryption built right into them providing for a more secure network. Interference is also not a problem with IP-based models.
Can utilize existing wiring -- Because IP-based cameras act as their own network device, you can often take advantage of existing network wiring within your home. This can make the installation task much easier.
Remote access can be easier -- IP cameras are better suited for remote surveillance needs.
Cons of IP cameras
Higher cost -- Because of the additional technology that is built into each camera, the cost is generally higher that analog versions.
Higher bandwidth required -- IP cameras require more bandwidth than analog cameras.
Given the pros and cost of each camera type, the decision really comes down to your specific surveillance needs. With an accurate assessment of your needs, the decision of which camera type to go with will become much easier.