Materi
Sebuah koperasi simpan pinjam punya tiga kantor yang disambung tautan /31: Surabaya (R-SBY), Malang (R-MLG), dan Kediri (R-KDR). Server arsip di Kediri berada di 10.30.8.0/22 dan sengaja dirutekan lewat Malang, karena tautan langsung Surabaya–Kediri berkapasitas kecil. Tabel routing ketiganya ditampilkan di bawah. Kerjakan empat butir berikut.
R-SBY
10.10.0.0/24 connected bridge-lan
10.255.0.0/31 connected ether1 (R-MLG = 10.255.0.1)
10.255.0.4/31 connected ether2 (R-KDR = 10.255.0.5)
203.0.113.0/29 connected ether3 (ISP)
10.20.0.0/16 via 10.255.0.1
10.30.0.0/16 via 10.255.0.5
10.30.8.0/22 via 10.255.0.1
0.0.0.0/0 via 203.0.113.1
R-MLG
10.20.0.0/24 connected bridge-lan
10.255.0.0/31 connected ether1 (R-SBY = 10.255.0.0)
10.255.0.2/31 connected ether2 (R-KDR = 10.255.0.3)
10.30.0.0/16 via 10.255.0.3
0.0.0.0/0 via 10.255.0.0
R-KDR
10.30.0.0/24 connected bridge-lan
10.30.8.0/22 connected ether3
10.255.0.2/31 connected ether1 (R-MLG = 10.255.0.2)
10.255.0.4/31 connected ether2 (R-SBY = 10.255.0.4)
0.0.0.0/0 via 10.255.0.4