command not understood ftp

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
command not understood ftp	0.6	0.8	8672	36	26
command	1.98	0.4	2191	94	7
not	0.69	0.3	9743	72	3
understood	0.63	0.2	7333	62	10
ftp	0.49	0.2	3280	58	3

Keyword	CPC	PCC	Volume	Score
command not understood ftp	1.06	0.7	9425	12
ftp opts utf8 on command not understood	1.16	0.7	8715	95
ftp 500 command not understood	0.28	0.8	5406	24
ftp command not found	0.3	0.9	5931	36
ftp command not find	1.55	0.4	281	49
ftp command not implemented	0.21	0.7	9856	88
ftp command not found linux	0.15	0.7	3887	18
ubuntu ftp command not found	1.85	0.2	4884	17
if ftp command failed	1.77	0.9	3335	85
ftp does not use	1.71	0.2	2635	97
protocol ftp is unknown	0.88	1	8944	47
ftp 500 unknown command	0.38	0.3	725	62
windows ftp command -s	0.06	0.3	4356	71
ftp mput command without prompt	0.73	1	2375	32
ftp clients common command	1.87	0.2	9452	55
how to use ftp command	1.09	0.8	9450	11
command prompt ftp commands	0.51	0.8	1938	6
explain various ftp commands	1.85	0.4	8678	6