# has 306 nets 120 gateways and 2052 hosts For gateways the most popular machines systems and services are: Machine Type Population LSI-11/23 33 VAX-11/780 16 VAX-11/750 15 NIL 8 PDP-11/34 8 PDP-11/23 7 LSI-11/2 7 LSI-11 4 PDP-11/40 4 PDP-11/44 3 PLURIBUS 2 PDP-11 2 M68000 2 PDP-11/45 1 LSI-11/3 1 DEC-2065T 1 VAX-11/730 1 FSNAP 1 CP8060 1 DSP-80 1 SUN-100 1 APOLLO 1 Operating System Population MOS 53 UNIX 33 NIL 12 ELF 4 LOS 4 EPOS 3 CMOS 2 COINS 2 PLURIBUS 1 TOPS20 1 FUZZ 1 VMS 1 OS86 1 AEGIS 1 EMMOS 1 Services Population IP/GW 107 GW/PRIME 42 EGP 38 GW/DUMB 17 GW/ALWAYS-UP 15 ICMP 9 TCP/TELNET 5 TCP/SMTP 4 TCP/FTP 4 IP/ST 3 UDP 1 GGP 1 NIL 1 TCP/FINGER 1 TCP/ECHO 1 For hosts the most popular machines systems and services are: Machine Type Population VAX-11/750 319 VAX-11/780 271 C/30 113 C/70 88 SYMBOLICS-3600 87 SUN-120 79 SUN-2/120 63 SUN-2/50 58 SUN 57 NIL 52 SUN-100 51 VAX-11/785 42 MICROVAX 38 LSI-11/23 35 DANDELION 31 IBM-PC 31 DEC-2060 26 PDP-11/70 23 IBM-4341 19 SUN-2/170 19 SUN-150 18 H-316 17 CTIWS-117 15 PDP-11/44 14 BUTTERFLY 14 VAX-11/730 13 FOONLY-F4 12 CP8040 12 PYRAMID-90X 12 APOLLO 11 UNIVAC-1100 10 DEC-2060T 10 SUN-2/160 10 PDP-11/45 9 SUN-170 9 WANG-PC002 8 SUN-50 8 GOULD-9080 8 IMAGEN-8/300 8 PLURIBUS 7 PDP-11/34 7 PDP-11 7 VAX-11/8600 7 SYMBOLICS-3670 7 MICROVAX-I 7 IBM-SERIES/1 6 PLEXUS-P/60 6 S1-MKIIA 6 TEKTRONIX-4404 6 DEC-1090T 5 IMAGEN 5 IBM-4361 5 IBM-3081 5 NOW 4 PDP-11/40 4 HONEYWELL-DPS-8/70 4 SPERRY-DCP/10 4 IBM-4956 4 NCR-COMTEN-3690 4 WANG-VS100 4 INTEL-310 4 IBM-PC/AT 4 VAX-8600 4 XEROX-8010 4 SUN-68000 4 SUN-2/150 4 DEC-2040T 4 CADLINC 3 PERQ 3 DEC-1080 3 M68000 3 DEC-1090B 3 TANDEM-TXP 3 FOONLY-F3 3 LSI-11/73 3 M-6800 3 INTEGRATED-SOLUTIONS 3 MASSCOMP 3 GOULD-9050 3 INTEGRATED-SOLUTIONS-CREATOR-8 3 SUN-2 3 SUN-2/100 3 SUN-3/160 3 RIDGE-32C 3 MICROVAX-II 3 PYRAMID-90 3 LSI-11 2 TRS-80 2 DEC-10 2 HONEYWELL-DPS-6 2 PROTOCOM-P250 2 PDP-11/50 2 UNIVAC-1100/62 2 UNIVAC-1100/60 2 GOULD-6050 2 VAX-11/782 2 DEC-2065 2 ONYX-Z8000 2 LSI-11/2 2 MC500 2 IBM-PC/XT 2 INTEGRATED-SOLUTIONS-68K 2 IRIS 2 H-68/80 2 SEQUENT-BALANCE-8000 2 DEC-FALCON 2 INTEGRATED-SOLUTIONS-CREATOR 2 SUN-3 2 IBM-AT 2 ISI 2 INTEL-IPSC 2 RIDGE-32 2 IBM-370/3033 1 DEC-2050T 1 DEC-KS10 1 TP-4000 1 H89 1 IMSAI 1 PLI 1 DORADO 1 PDP-11/3 1 DPS8/70M 1 IBM-PCAT 1 PDP-11/73 1 ALTO 1 IBMPCXT 1 UNIVAC-1100/64 1 HONEYWELL-DPS-8 1 DEC-1090 1 DEC-1077 1 DEC-1050 1 IBM-3101 1 UNIVAC-1100/70 1 DEC-2040 1 DEC-2020T 1 COMTEN-3690 1 WANG-VS400 1 H-60/68 1 NCR-TOWER-1632 1 FOONLY-F2 1 HP3000 1 UNIVAC-1100/63 1 HP3000/64 1 IBM-4331 1 UNIVAC-1160 1 TOWER 1 BURROUGHS-B/4800 1 BBN-C/60 1 PYRAMID98-XE 1 PE-7/32 1 PE-3205 1 ROLM-1666 1 SIEMENS 1 ATT-3B20 1 H-68 1 SEQUENT 1 IBM-3084QX 1 SILICON-GRAPHICS 1 PDP-11/24 1 VAX-11/790 1 CDC-170 1 GOULD-PN600 1 IS-1 1 TI-EXPLORER 1 PDP-11/23 1 RIDGE 1 SUN-2/140 1 IS-68010 1 SILICON-GRAPHICS-IRIS 1 IRIS-1400 1 XEROX-1100 1 XEROX-1108 1 GOULD-6080 1 PYRAMID-90MX 1 MACINTOSH 1 AMDAHL 1 UVAX-II 1 INTEGRATED-SOLUTIONS-68020 1 MC68000 1 CDC-170/750 1 IBM-4381 1 SUN-3/75 1 SG-1400 1 SGI-IRIS 1 LMI-LAMBDA 1 TEK-6130 1 IS-68K 1 GOULD 1 SUN-160 1 VAX-11/725 1 ELXSI-6400 1 CELERITY-1200 1 MV/8000 1 Operating System Population UNIX 1129 VMS 176 TAC 115 LISPM 94 NIL 58 TOPS20 56 MSDOS 45 D 31 FUZZ 27 SIMP 15 CTOS 15 OS-1100 14 CHRYSALIS 14 TENEX 12 MOS 12 OS86 12 VM/CMS 10 ULTRIX 10 PLI 9 RSX11M 9 ELF 9 EDX 8 VM 8 MULTICS 8 WANG 7 TOPS10 6 EPOS 6 MVS 6 UNIFLEX 6 DOMAIN 6 XENIX 6 IMAGEN 5 VM/SP 5 ROS 5 SWIFT 4 GCOS 4 INTERLISP 4 LOCUS 3 V 3 PERQ-OS 3 CMOS 3 SCS 3 TANDEM 3 MVS/SP 3 LOGICAL-HOST 3 VRTX 3 AEGIS 3 ITS 2 TRSDOS 2 UNISCOPE 2 OS/DDP 2 WAITS 2 OS1100 2 NEXUS 2 DCN 2 XDE 2 OSX 2 LISP 2 CPIX 1 VM/370 1 OS4 1 HDOS 1 ZMOS 1 CEDAR 1 CGW 1 NMS 1 TFTPSP 1 APOLLO 1 APDS 1 VMS/EUNICE 1 FOONEX 1 O/S 1 TP3010 1 SATOPS 1 COS 1 CMS 1 MPE5 1 DDNOS 1 NCP 1 OS-1160 1 NONSTOP 1 PCDOS 1 MINOS 1 IMPRESS 1 RMX/RDOS 1 BS-2000 1 UT2D 1 EMMOS 1 UTS 1 IOS 1 NOS-2 1 EMBOS 1 Services Population TCP/TELNET 1690 TCP/FTP 1583 TCP/SMTP 1448 UDP 595 ICMP 581 TCP/FINGER 426 TCP/TIME 210 TCP/ECHO 171 UDP/TFTP 160 UDP/TIME 111 IP 101 TCP 100 X.25 83 UDP/FINGER 79 UDP/DOMAIN 58 NIL 56 TCP/DAYTIME 23 TCP/SUPDUP 23 TCP/DISCARD 20 UDP/ECHO 19 TCP/MPM 17 EGP 12 TCP/CHARGEN 12 TCP/TALK 11 TCP/QUOTE 7 UDP/NAME 7 TCP/SYSTAT 6 PUP 6 GGP 5 TCP/DOMAIN 5 IP/GW 4 MMDF 4 IP/ECHO 4 UDP/DISCARD 3 IP/TIME 3 TCP/TFTP 3 TCP/RCP 3 TCP/RLOGIN 3 TCP/TTYTST 3 IP/ST 2 TCP/MLDEV 2 TCP/TCPSTAT 2 TCP/PRINTER 2 XNET 2 UDP/CHARGEN 1 TCP/NAME 1 UDP/DAYTIME 1 NCP 1 UCP 1 TCP/MTP 1 UDP/TALK 1 UDP/BIFF 1 UDP/ROUTE 1 UDP/WHO 1 TCP/SHELL 1 TCP/EXEC 1 TCP/LOGIN 1 UDP/TFTPP 1 TCP/TACACS-DS 1 TCP/NETSTAT 1