(21)封禁ICMP协议,只转发212.78.170.166/27所在子网的所有站点的ICMP数据包,正确的access-list配置是( )
) e& `3 f( X, ?- M& `/ S9 Q* C8 [A) Router(config)#access-list 110 permit icmp 212.78.170.166 0.0.0.0 any+ \- Z8 u8 I& V6 f% m
Router(config)#access-list 110 deny icmp any any& |( R J- L. m3 L
Router(config)#access-list 110 permit ip any any
0 a* c, A8 q/ b6 @B) Router(config)#access-list 110 permit icmp 212.78.170.0 255.255.255.224 any
. V' r0 c' t0 F% V9 s6 XRouter(config)#access-list 110 permit ip any any
. K2 M6 b, F4 {5 A: e5 k+ G: ?Router(config)#access-list 110 deny icmp any any3 U! i0 S8 ?( c* d
C) Router(config)#access-list 110 perimt icmp 212.78.170.0 0.0.0.255 any4 G5 C4 W& b4 @" H
Router(config)#access-list 110 deny icmp any any
! d: u% C1 T: C% gRouter(config)#access-list 110 permit ip any any3 ?! {$ U F$ n: g/ B) i6 J
D) Router(config)#access-list 110 permit icmp 212.78.170.160 0.0.0.31 any. t z) N2 S) b$ ~/ A) }4 Q
Router(config)#access-list 110 deny icmp any any
9 {' U# K! w% [8 `. VRouter(config)#access-list 110 permit ip any any
8 |0 J# q1 B: C, m, v- ^; \(22)Cisco路由器执行show access-list命令显示如下一组控制列表信息( )) X. i, H( I4 {/ H4 R4 d
Standard IP access list 30
2 P3 |" Y! c; G$ |deny 127.0.0.0,wildcard bits 0.255.255.255* `0 A0 b- t! y G7 ~6 Z$ _+ G
deny 172.16.0.0,wildcard bits 0.15.255.255! b) w8 B, f; F# z+ R
permit any! h" K1 S* l0 O/ p
根据上述信息,正确的access-list配置是
) d2 |+ i& ^$ ?* |A) Router(config)#access-list 30 deny 127.0.0.0 255.255.255.0! _$ i' Q p( f4 X
Router(config)#access-list 30 deny 172.16.0.0 255.240.0.0
+ |0 J1 g* o: \% ?0 }2 W9 pRouter(config)#access-list 30 permit any
* p8 L8 {% ~, ?! k9 y+ jB) Router(config-std-nacl)#access-list 30 deny 127.0.0.0 0.255.255.2552 z( }& o3 y1 f% p" D: n! w
Router(config-std-nacl)#access-list 30 deny 172.16.0.0 0.15.255.255
: O# o% V$ J, W7 T3 o4 k! [. \* JRouter(config-std-nacl)#access-list 30 permit any
* y$ w' I+ j4 {1 \$ s$ r2 EC) Router(config)#access-list 30 deny 127.0.0.0 0.255.255.2558 C7 D8 L* E8 W! i) u
Router(config)#access-list 30 deny 172.16.0.0 0.15.255.255
. i8 m1 F4 K4 |Router(config)#access-list 30 permit any" k6 y8 D( ?( T/ P, \
D) Router(config)#access-list 30 deny 127.0.0.0 0.255.255.255' l! q! I$ [ E2 \6 X
Router(config)#access-list 30 permit any
9 }9 v9 |; Q5 wRouter(config)#access-list 30 deny 172.16.0.0 0.15.255.255 |