What is the significance of protocols in network communication? Explain why protocols are essential for proper communication between network devices. 

Compare and contrast the TCP/IP protocol suite with the OSI model. Identify the corresponding layers in both models and explain how they relate to each other

Discuss the role of the Internet Control Message Protocol (ICMP) in the TCP/IP protocol suite. Explain the purpose of ICMP message fields, including Type, Code, and Checksum. Provide examples of attacks that exploit ICMP and briefly describe each attack. 

Describe the functions and benefits of the Simple Network Management Protocol (SNMP) in network administration. Explain how SNMP enables remote monitoring, management, and configuration of network devices. 

Explain the role of the Domain Name System (DNS) in mapping IP addresses to symbolic names. Discuss the potential security vulnerabilities associated with DNS and describe how the latest edition of DNS software addresses the issue of DNS poisoning. Additionally, elaborate on the security implications of zone transfer in DNS.