 3.       DNS 165

4.        , 
    (      
   ).

,   SRI-NIC.ARPA   (. 3.27):

Header	OPCODE = SQUERY, RESPONSE
Question	QNAME=ISI.EDU.,	QCLASS	= IN, QTYPE = MX
Answer	<empty>
Authority	ISI.EDU.	172800	IN NS VAXA.ISI.EDU.
			NS A.ISI.EDU.
			NS VENERA.ISI.EDU.
Additional	VAXA.ISI.EDU.	172800	A 10.2.0.27
		172800	A 128.9.0.33
	VENERA.ISI.EDU.	172800	A 10.1.0.52
		172800	A 128.9.0.32
	A.ISI.EDU.	172800	A 26.3.0.103

. 3.27.  DNS-     MX  -
      

         
SLIST,      ( 
   "match count"    
):

match count = 3

A.ISI.EDU.      26.3.0.103

VAXA.ISI.EDU.   10.2.0.27       128.9.0.33

VENERA.ISI.EDU. 10.1.0.52       128.9.0.32

        MX. 
   ,    . 3.28.

  ,     
    MX RR .