Application Layer Consider the below WAN network topology. What is the destination port number used to access the server whose IP is 81.80.153.77? Your answer WAN Network Topology THE INTERNET Assume PCA needs to request the file from the server. Which Server should PCA has to contact? * RI: Fa 010 DHCP Server DNS Server 73.80.113.55 FTP Server 81.80.153.77 ftp://ftp.gnu.org DNS Server PCA 192.168.1.1 HTTP Server SW1 (LAN A): 192.168.1.0/24 O FTP Server DHCP Server 192.168.1.100 Using which transport protocol PCA request an FTP Traffic? * Let's Assume PCA needs to access ftp://ftp.gnu.org but it doesn't know any information about its network address. Which server should PCA contact first? * o TCP UDP DHCP Server DNS Server O None of them HTTP Server Local Server