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Questions and Answers
Match the SSL protocol with its primary function:
Record Protocol = Provides confidentiality and integrity Alert Protocol = Detects and handles errors Handshake Protocol = Establishes a secure connection Session Protocol = Manages session identifiers
Match the security protocol with its primary purpose:
TLS = Transport Layer Security SHTTP = Secure Hyper Text Transfer Protocol SET = Secure Electronic Transaction PEM = Privacy Enhanced Mail
Match the error type with its consequence in SSL connection:
Fatal error = Immediately closes the SSL connection Non-fatal error = Does not result in the termination of the connection Warning = Sends an alert message to the other party Notification = Destroys the session identifiers, secrets and keys
Match the SSL protocol with its operation phase:
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Match the security concept with its primary goal:
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Match the security protocol with its primary application:
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Match the SSL protocol with its message format:
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Match the security protocol with its primary security feature:
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Match the error handling mechanism with its consequence in SSL connection:
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Match the security protocol with its primary security goal:
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Study Notes
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A VPN (Virtual Private Network) is a mechanism that employs encryption, authentication, and integrity protection to use a public network (like the Internet) as if it is a private network.
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VPN combines the advantages of a public network (cheap and easily available) with those of a private network (secure and reliable).
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There are three main VPN protocols: Point to Point Tunneling Protocol (PPTP), Layer 2 Tunneling Protocol (L2TP), and IPsec.
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PPTP is used on Windows NT systems and mainly supports VPN connectivity between a single user and a LAN, rather than between two LANs.
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L2TP is an improvement over PPTP, considered a secure open standard for VPN connections, and works for both user-to-LAN and LAN-to-LAN combinations.
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L2TP can include IPsec functionality as well.
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IPsec offers two levels of security: security at the IP packet level itself and higher-level security mechanisms.
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SSL (Secure Socket Layer) is an Internet protocol for the secure exchange of information between a Web browser and a Web server.
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SSL provides two basic security services: authentication and confidentiality.
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SSL logically provides a secure pipe between the Web browser and the Web server.
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Netscape Corporation developed SSL in 1994, and it is the world’s most popular Web-security mechanism.
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SSL has three sub-protocols: the Handshake Protocol, the Record Protocol, and the Alert Protocol.
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The Handshake Protocol is used by the client and the server to communicate using an SSL-enabled connection.
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The Handshake protocol consists of a series of messages between the client and the server.
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The Record Protocol provides two services to an SSL connection: confidentiality and integrity.
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The Alert Protocol is used when either the client or the server detects an error, and the detecting party sends an alert message to the other party.
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Description
Understand the concepts of Virtual Private Networks (VPN) and Encapsulating Security Payload (ESP) in Network and Internet Security. Learn about the mechanisms of encryption, authentication, and integrity protection in VPNs.
