A.1600万
B.1700万
C.1800万
D.3600万
A.应用层(Application)
B.主机到主机层(Host to Host)
C.IP层
D.网络访问层(Networks Access)
子网主机数量Nhost=12,则选择host ID字段的长度值Y=(),而实际最多可用的主机号有 ()个。
子网主机数量Nhost=50,则选择host ID字段的长度值Y=(),而实际最多可用的主机号有()个。
A.5,30
B.6,64
C.6,62
D.5,32
只封禁一台IP地址为203.168.47.59主机的access-list的正确配置是(41) 。
A.access-list 110permit ip any any access-list 110deny ip host 203.168.47.59 any access-list 110deny ip any host 203.168.47.59
B.access-list 110deny ip host 203.168.47.59any access-list 110deny ip any host 203.168.47.59 access-list 110permit ip any any
C.access-list 110deny ip host 203.168.47.59 any access-list 110deny ip any host 203.168.47.59
D.access-list 110deny ip host 203.168.47.59 any access-list 110permit ip any any access-list 110deny ip any host 203.168.47.59
只封禁一台地址为192.168.1.230主机的access-list正确配置是 (5) 。 A.access-list 110 permit中anyany access-list 110 deny中host 192.168.1.230 any access-list 110 deny ip anyhost 192.168.1.230
B.access-list 110 deny中host 192.168.1.230 any access-list 110 deny中any host 192.168.1.230 access-list 110 permit ip anyany
C.access-list 110 deny ip host 192.168.1.230 any access-list 110 deny ip any host 192.168.1.230
D.access-list 110 deny ip host 192.168.1.230 any access-list 110 permit ip anyany access-list 110 deny ip any host 192.168.1.230
● ACL语句“permit tcp host 10.0.0.10 eq www any”的含义是 (58) 。
(58)
A. 允许从10.0.0.10到任何主机的 TCP通信
B. 允许从任何主机到10.0.0.10的 TCP通信
C. 允许从10.0.0.10 到任何主机的 HTTP通信
D. 允许从任何主机到10.0.0.10 的HTTP通信
A.Referer
B.User-Agent
C.Cookie
D.Host
● ACL语句“permit tcp host 10.0.0.10 eq www any”的含义是 (58) 。
(58)A. 允许从10.0.0.10到任何主机的TCP通信
B. 允许从任何主机到10.0.0.10的TCP通信
C. 允许从10.0.0.10到任何主机的HTTP通信
D. 允许从任何主机到10.0.0.10的HTTP通信