Exam CV0-003 topic 1 question 81 discussion

22 is for SSH 443 is for HTTPS 445 is for SMB

From a security perspective, you want to ensure that your VPN tunnel is set up to allow secure and encrypted communication between your private and public clouds. Common VPN protocols include SSL/TLS (used on port 443) and IPsec (which can use various ports, but UDP 500 for IKE negotiation is common). SMB (Server Message Block) ports (137-139 and 445) are typically associated with file sharing and may not be needed for a VPN tunnel. So, the **best option** for secure VPN communication in this scenario would be: **B. 22, 443, 445** - Port 22 is for SSH, which can be used for secure remote administration. - Port 443 is commonly used for SSL/TLS encrypted communication, which is secure. - Port 445 is associated with SMB, which is less likely to be needed for a VPN tunnel and is often used for file sharing.

B. 22, 443, 445

Given the VPN is taking care of the secure part of the equation, I guess you could technically get away with "D", but NetBIOS is deprecated. SFTP is better suited for moving large files compared to SMB. There's no mention of overhead concern here so securely transferring your files (SFTP) over a secure connection (VPN) isn't something I would see as being problematic (can never be too secure). SMB may need to rely on NetBios to communicate, but ONLY if the device in question is old and is unable to support direct hosting of SMB over TCP/IP.

B, because SFTP/SSH, HTTPS, and SMB are more secure than netbios and can be used for file transfers. Also, netbios isn't on exam objectives and SFTP is (not like that always matters)

I think B

137 - NetBIOS - Allow windows machines to "talk" on the network. 139,445 - SMB - Protocol for sharing data. Usually, you need the conjunction of them to have SMB working. https://www.varonis.com/pt-br/blog/smb-port