Network Security Paper
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Discussion Questions
When is IPSec appropriate? When is SSL / TLS appropriate?
IPSec is used to create secure VPN connections across the Internet for remote access and branch office connectivity. IPSec is a general technology for securing IP traffic; it is designed to work in two different models: transport mode and tunnel mode.
SSL / TLS is designed for client application-to-server application authentication and encryption. Therefore, the general purpose of use is whenever authentication and data protection are necessary.
At what layer does IPSec function in?
IPSec works at the IP layer of the Transmission Control Protocol / Internet Protocol (TCP/IP) stack; it works on the Network layer of the OSI model.
What are two important VPN protocols for remote access VPN connections?
Point-to-Point Tunneling Protocol (PPTP)
Layer Two Tunneling Protocol (L2TP) with Internet Protocol Security
Why do organizations want to move to a single sign-on environment?
The objective of a single sign-on environment is to require the user to authenticate once. It ultimately delivers ease of use among users. Single sign-on environments increases the usage of a system, increase returns on technical investments, and reduces cost for maintaining multiple passwords and usersЎ¦ names.
Short Answers Explanation to Explain the Difference
Historical and statistical logging
Historical logging is a complete recording of all data passing through a device.
Statistical logging is statistics that are kept on each data port.
File security and firewalls
File Security is a translation of an encrypted file in which you must have access.
Firewall is a system designed to prevent unauthorized access to or from a private network.
Secret and public keys
Secret key is known only to the recipient of the message.
Public key is known to everyone.
Symmetric and asymmetric keys
Symmetric (same key to encrypt and decrypt)
Asymmetric (public key to encrypt, private key to decrypt)
Digital certificate and digital postmark
Digital certificate is an attachment to an electronic message used for security purposes.
Digital postmark is a network security mechanism to identify which region a packet or set of packets comes from.
Plaintext & ciphertext
Plaintext is information used to input to an encryption algorithm.
Ciphertext is encrypted text.
Decipher & encipher
Decipher ЎV Convert code into ordinary language.
Encipher is to convert plain text into an unintelligible form by means of a cipher.
IPSec VPNs & SSL VPNs
IPSec ЎV Internet Protocol Security
SSL ЎV Secure Sockets Layer
Short Answers Explanation to Define
RSA cryptographic algorithm
RSA is a public key algorithm