Section 1.3-energy Efficient Mac Protocols and Section 1.4-energy Efficient Routing Protocols. Four Mac Protocols Are Discussed in Section 1.3. Section 1.3.1 Discusses the 802.11 Protocol. Section 1.3.2 Discusses the Ec-mac Protocol. Section 1.3.3 Discusses the Pamas Protocol. Finally, Section 1.3.4