Question

1. The OSl medel Application Layer serves which primary purpase) a It dehinas well known logical port addresses fer b c d. communications between spplications It controls dialogs between two or more Presentation Layer entit朴 It establishes user application procedures for errot recovery and data incegrity It creates a hierarchical addressing model for meving nformation across networks recovety Which of the following is the primary purpose of the OSl model Transport Layer? 2. a. It defines wel known logical port addresses for b. It establishes, manages, and terminates sessions between c It establishes user application procedures for eror recovery d It controls dislogs between tro or more Presentation Layer communications between applications applications. and data integrity entibes. 3. Telnet is an example of which TCP/IP layer protocol? a. Network Interface b. Internetwork c. Transport d. Application 4. Which TCP/IP Intemetwork Layer protocol provides troubleshooting utilities, such as ping and traceroute? a. ICMP b. IGMP c ARP :4 d. IARP

I am studying for a Networking test. I have already answered these and need to know if they are right. please help