The LD50 of nicotine is 50 mg/kg for rats and 3 mg/kg for mice. 0.5-1.0 mg/kg can be a lethal dosage for adult humans, and 0.1 mg/kg for children.
IPSec is a suite of protocols that provide security services at IP layer of TCP/IP stack i.e. Network Layer in OSI model. As Andy Lemke mentioned, IPSec suite comprises of two protocols to offer security to. 1. AH - Authentication Header Protocol.(Protocol no: 51) 2. ESP - Encapsulation of security payload Protocol.
IPSec Overview. 1  IP Security Protocol Authentication Header (AH) Encapsulating Security Payload (ESP) 2  Data Encryption Standard (DES) 3  Triple DES (3DES) 4  Diffie-Hellman (D-H) 5  Message Digest 5 (MD5) 6  Secure Hash Algorithm-1 (SHA-1) 7  Rivest, Shamir, and Adelman (RSA) Signatures. 8  Internet Key Exchange (IKE) 9  Certificate Authorities (CAs)