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You're comparing apples and oranges.<br />
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AES is a 128-bit symmetric cypher. See <a href="http://www.esat.kuleuven.ac.be/~rijmen/rijndael/" rel="ugc">http://www.esat.kuleuven.ac.be/~rijmen/rijndael/</a>&nbsp;and <a href="http://csrc.nist.gov/CryptoToolkit/aes/rijndael/" rel="ugc">http://csrc.nist.gov/CryptoToolkit/aes/rijndael/</a>&nbsp;for more information on AES.<br />
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PGP is a framework for encrypting and signing data. It uses a variety of cryptographic algorithms under the hood to do this. See <a href="http://www.pgp.com/" rel="ugc">http://www.pgp.com/</a>&nbsp;and <a href="http://www.gnupg.org/" rel="ugc">http://www.gnupg.org/</a>&nbsp;for more information on PGP.
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You're comparing apples and oranges.

AES is a 128-bit symmetric cypher. See http://www.esat.kuleuven.ac.be/~rijmen/rijndael/ [http://www.esat.kuleuven.ac.be/~rijmen/rijndael/] and http://csrc.nist.gov/CryptoToolkit/aes/rijndael/ [http://csrc.nist.gov/CryptoToolkit/aes/rijndael/] for more information on AES.

PGP is a framework for encrypting and signing data. It uses a variety of cryptographic algorithms under the hood to do this. See http://www.pgp.com/ [http://www.pgp.com/] and http://www.gnupg.org/ [http://www.gnupg.org/] for more information on PGP.

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basically PGP is a cryptosystem... it uses both symmetric and asymmetric key cryptosystems.<br />
on the symmetric side PGP uses DES, CAST, Triple DES, or IDEA for encryption<br />
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AES is the replacement for Triple DES.... &nbsp; <br />
Hope this puts the pieces together for you....
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basically PGP is a cryptosystem... it uses both symmetric and asymmetric key cryptosystems.
on the symmetric side PGP uses DES, CAST, Triple DES, or IDEA for encryption

AES is the replacement for Triple DES....  
Hope this puts the pieces together for you....

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Can someone please explain, in detail, how AES encryption works and why it might be a better solution than using PGP encryption?
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Can someone please explain, in detail, how AES encryption works and why it might be a better solution than using PGP encryption?

AES encryption

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.

Security

Encryption is the process of encoding messages or information in such a way that only authorized parties can read it. In an encryption scheme, the intended communication information or message, referred to as plaintext, is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients, but not to unauthorized interceptors.

Encryption

Internet Protocol Security (IPsec) is a protocol suite for secure Internet Protocol (IP) communications by authenticating and encrypting each IP packet of a communication session. IPsec includes protocols for establishing mutual authentication between agents at the beginning of the session and negotiation of cryptographic keys to be used during the session. IPsec can be used in protecting data flows between a pair of hosts (host-to-host), between a pair of security gateways (network-to-network), or between a security gateway and a host (network-to-host). IPsec is an end-to-end security scheme operating in the Internet Layer of the Internet Protocol Suite.