Terms you'll need to understand:
Ciphertext
Confidentiality
Integrity
Origin authentication
Hashing
Encryption
Hash Message Authentication Code (HMAC)
Digital signature
Digital certificate
Techniques you'll need to master:
Defining interesting traffic
Defining Internet Key Exchange (IKE) Phase 1
Defining IKE Phase 2
Generating Rivest, Shamir, and Adleman (RSA) key pairs
Enrolling with a certificate authority (CA)
Defining IP Security (IPSec) peers
Using the Simple Certificate Enrollment Protocol (SCEP)