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IPv4 Convergence Sublayer IPv4 CS is responsible for the transmission and reception of IPv4 packets Functions of IPv4 CS Classification of an IPv4 packet to an appropriate MAC Connection Payload Header Suppression (PHS) (optional) Delivery of the resulting IPv4 CS PDU to the MAC-CPS SAP to deliver to the peer MAC-CPS SAP. Receipt of the IPv4 CS PDU from the MAC-CS SAP Rebuilding the IPv4 header if PHS is in use Classification parameters constitute of IPv4 Header and Transport Header Source and Destination IPv4 addresses Source and Destinations Ports Type-of-Service IP Protocol Filed |