solve fast please

WAN Network Topology THE INTERNET DNS Server 73 80 11355 FTP Server 81 80 15317 ftp://ftp.gnu.org SWT DANA 192.168102 DHCP Server Assume PCA needs to request the file from the server. Which Server should PCA has to contact? * O DHCP Server O DNS Server HTTP Server FTP Server Using which transport protocol PCA request an FTP Traffic? O TCP UDP None of them 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 DHCP Server DNS Server O HTTP Server O Local Server What is the destination port number used to access the server whose IP is 81.80.153.77? Your