Query Or Script To Check Link Table

i'm pretty familiar w/ mysql, but relatively new to ms sql. Since i can do a lot more w/ ms sql, I have been trying to do all tasks in sql queries or scripts, but i'm stumped on this one. I have a table that links two things together. t1 has rows id1 and id2. When a row has these two id's, there is a "link" between them. I'm trying to make a command or script that will see if there is only 2 links for any given id.

for example, it would loop through each row, and run this command:

SELECT COUNT(*) AS Expr1
FROM links
WHERE (Id1 = this_rows_id1) OR (Id2 = this_rows_id1)

and again w/ id2

and then i would be interested in any row that only had a count of 2. is this possible?