Network+ Security Protocols
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| IPSec | Internet Protocol Security
A suite of protocols used to encrypt data packets
-Designed by IETF for secure transmissions at the IP layer
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| IPSec Modes | Transport Mode
-Only the data is encrypted
Tunnel Mode
-The entire packet, including headers, is encrypted, making this mode more secure
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| L2TP | Layer 2 Tunneling Protocol
-An enhanced tunneling protocol that is used in multiprotocol VPN implementations
-Is optimized to work with IPv6 and IPSec
-It is an extension to the PPP protocol
-Operates at the Data Link Layer
-defined in RFC 2661
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| SSL | Secure Sockets Layer
-Enables secure communications over the Internet
-Invented by Netscape
-Uses a Public/Private key pair to encrypt and decrypt transmissions
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| Public/Private Key system and operation process | A system used in SSL and other protocols to secure communications
-The sender looks up the receiver's private key
-It encrypts the data using that key
-It sends the data to the receiver
-The receiver decrypts the transmission using its Private key
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| WEP | Wired Equivalent Privacy
Encrypts communications between clients and wireless access points (WAPs)
-Intended to simulate the physical security of a wired LAN
-Uses a single, statically configured key for access control
-Operates at the Physical and Da
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| WPA | Wifi Protected Access
Designed as an improved replacement for WEP
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| WPA Advantages | -Supports Extensible Authentication Protocol (EAP) for user authentication
-Supports Temporal Key Integrity Protocol (TKIP), which supports kry sdcrambling and integrity checking
-Will be replaced by 802.11i when it is completed
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| 802.1x | An 802.11 WLAN authentication standard that uses EAP
and supports user-level authentication through various methods (password, certificate, etc.)
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| 802.1x Authentication Process | -The supplicant (client) requests access from the authenticator (WAP) by sending an EAP start message
-The authenticator sets the supplicant's client software to 'unauthorized', which prevents all traffic except for 802.1x traffic from being received
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