Russian Visas are classified based on:
Number of entries:
Single-entry Russian visa allows you to enter Russia only ONCE within the specified period of time.
Double-entry Russian visa gives you permission to enter Russia ONCE or TWICE within the specified period of time.
Multiple-entry Russian visa is valid for more than 2 visits to Russia during 3, 6 or 12 months.
Purpose of visit:
Tourist Visa is for single or double entry and a maximum stay of thirty days.
Private or Homestay Visa is for single or double entry for a maximum of ninety days stay.
Transit Visa is for travelers having flights connection in Russia transit visa is issued for 72 hours. For the transit travel by car maximum validity of the transit Russian visa is 10 days. The exact duration of visa is defined of the shortest transit distance and daily mileage of 500 km. Also it is not obligatory if you are on a direct flight through Russian territory.
Student Visa can be issued to students who will be enrolled on academic or language programs in Russia. It can be valid from three months up to one year in the first instance, but it is extendible, depending on how long you will be studying in Russia.
Business Visa is issued for foreigners who enter Russia for business purposes. It is valid for up to 12 months with single, double or multiple entry though allows a maximum of 90 days in a 180 day period.
Employment Visa is valid from three months up to one year with multiple entries. It can be issued only based on Russian work permit, an employment agreement, official Russian visa invitation, and the company must also be in possession of a license for hiring foreign employees.
Other types of Russian Visa
There are also other types for very specific cases, such as: diplomatic visa, refugee visa, visa for humanitarian and religious purposes, etc.