Which TCP port does LDP use for its protocol communications?()
A、464
B、466
C、644
D、646
A、464
B、466
C、644
D、646
A、 port 21(ftp):tcp and port 657(rmc):tcp B、 port 22(ssh):tcp and port 657(rmc):udp C、 port 657(rmc):tcp and port 657(rmc):udp D、 port 161(snmp):tcp and port 161(snmp):udp
A、a telnet to port 80 B、a TCP packet with the SYN and ACK flags set C、an SNMP getnext request D、an ICMP packet larger than 1024 bytes