4. Issue the command nmap with the sV qualifier (find information using the man pages or ww the command list found on Blackboard): What is the purpose of the two modifiers used (s and V)? What is the meaning of the information displayed? What is different from the previous command(nmap ), without the SV qualifier? How can an attacker use it? instructor@ubuntu:~$ nmap -SV 192.168.152.128 Starting Nmap 7.60 ( https://nmap.org) at 2019-02-20 12:36 PST Nmap scan report for 192.168.152.128 Host is up (0.0012s latency). Not shown: 977 closed ports PORT STATE SERVICE 21/tcp open ftp 22/tcp open ssh 23/tcp open telnet 25/tcp open smtp 53/tcp open domain 80/tcp open http 111/tcp open rpcbind VERSION vsftpd 2.3.4 OpenSSH 4.7p1 Debian 8ubuntu1 (protocol 2.0) Linux telnetd Postfix smtpd ISC BIND 9.4.2 Apache httpd 2.2.8 ((Ubuntu) DAV/2) 2 (RPC #100000) netbios-ssn Samba smbd 3.X 4.X (workgroup: WORKGROUP) netbios-ssn Samba smbd 3.X exec login? - 4.X (workgroup: WORKGROUP) netkit-rsh rexecd 139/tcp open 445/tcp open 512/tcp open 513/tcp open 514/tcp open tcpwrapped 1099/tcp open 1524/tcp open shell 2049/tcp open nfs 2121/tcp open ftp 3306/tcp open mysql 5432/tcp open postgresql 5900/tcp open vnc 6000/tcp open X11 6667/tcp open irc rmiregistry GNU Classpath grmiregistry Metasploitable root shell 2-4 (RPC #100003) ProFTPD 1.3.1 MySQL 5.0.51a-3ubuntu5 PostgreSQL DB 8.3.0 - 8.3.7 VNC (protocol 3.3) (access denied) UnrealIRCd 8009/tcD ODEN aid13 Apache Jserv (Protocol v1.3)