Узбекское Агентство связи и информатизации

Упражнение 5. Определение пути IP-пакета
С помощью команды tracert проверьте для перечисленных ниже адресов, через какие промежуточные узлы идет сигнал. Отметьте их:
172.16.11.1:
1 <1ms <1ms <1ms router.504.auditory.ru [192.168.204.1]
2 <1ms <1ms <1ms 80.250.162.161
3 <1ms <1ms <1ms core-gw0.plus.ru [82.179.193.89]
4 1ms <1ms 1ms gi0-0-101.msk-gw1.plus.ru [82.179.192.18]
172.16.0.1:
1 <1ms <1ms <1ms router.504.auditory.ru [192.168.204.1]
2 <1ms <1ms <1ms 80.250.162.161
3 8ms 8ms <1ms core-gw0.plus.ru [82.179.193.89]
4 1ms 1ms < 1ms gi0-0-101.msk-gw1.plus.ru [82.179.192.18]

172.16.0.2:

1 <1ms <1ms <1ms router.504.auditory.ru [192.168.204.1]
2 <1ms <1ms <1ms 80.250.162.161
3 <1ms <1ms<1ms core-gw0.plus.ru [82.179.193.89]
4 1ms <1ms < 1ms gi0-0-101.msk-gw1.plus.ru [82.179.192.18]
192.168.135.1:
1 <1ms <1ms <1ms router.504.auditory.ru [192.168.204.1]
2 <1ms <1ms <1ms 80.250.162.161
3 <1ms <1ms<1ms core-gw0.plus.ru [82.179.193.89]
4 1ms <1ms 1ms gi0-0-101.msk-gw1.plus.ru [82.179.192.18]
cacedy.unibel.by
www.bsu.unibel.by


Упражнение 6: Просмотр ARP-КЭШа
С помощью утилиты arp просмотрите ARP-таблицу локального компьютера.
Interface: 192.168.204.52---0x10005
Internet Address Physical Address Type

1. 
   00-0e-0c-84-98-16 dynamic
   

Упражнение 7. Получение информации о текущих сетевых соединениях и протоколах стека TCP/IP.
C помощью утилиты netstat выведите перечень сетевых соединений и статистическую информацию для протоколов UDP, TCP, ICMP, IP.
Active Connections

Proto Local Address Foreign Address State

TCP 127.0.0.1:1043 127.0.0.1:1044 ESTABLISHED
TCP 127.0.0.1:1044 127.0.0.1:1043 ESTABLISHED
TCP 192.168.204.52:1072 84.53.138.17:80 CLOSE_WAIT

IPv4 Statistics

Packets Received =2276
Received Header Errors =0
Received Address Errors =30
Datagram’s Forwarded =0
Unknown Protocols Received =0
Received Packets Discarded =0
Received Packets Delivered =2276
Output Requests =1644
Routing Discards =0
Discarded Output Packets =0
Output Packet No Route =0
Reassembly Required =0
Reassembly Successful =0
Reassembly Failures =0
Datagram’s Successfully Fragmented =0
Datagram’s Failing Fragmentation =0
Fragments Created =0

ICMPv4 Statistics

Received Sent

Messages 125 192
Errors 0 0
Destination Unreachable 3 3
Time Exceeded 48 0
Parameter Problems 0 0
Source Quenches 0 0
Redirects 0 0
Echos 13 176
Echo Replies 61 13
Timestamps 0 0
Timestamp Replies 0 0
Address Masks 0 0
Address Mask Replies 0 0

TCP Statistics for IPv4

Active Opens =28

Passive Opens =1
Failed Connection Attempts =2
Reset Connections =9
Current Connections =3
Segments Received =1094
Segments Sent =1073
Segments Retransmitted =6

UDP Statistics for IPv4

Datagram’s Received =1118

No Ports =66
Receive Errors =17
Datagram’s Sent =367