仅仅允许到主机1.1.1.1的SMTP邮件服务的命令是()。
A: access-list 10 permit smtp host 1.1.1.1
B: access-list 110 permit ip smtp host 1.1.1.1
C: access-list 10 permit tcp any host 1.1.1.1 eq smtp
D: access-list 110 permit tcp any host 1.1.1.1 eq smt
A: access-list 10 permit smtp host 1.1.1.1
B: access-list 110 permit ip smtp host 1.1.1.1
C: access-list 10 permit tcp any host 1.1.1.1 eq smtp
D: access-list 110 permit tcp any host 1.1.1.1 eq smt
举一反三
- 下列命令中,正确的是: A: access-list 101 permit icmp any 172.16.1.3 0.0.0.0 B: access-list 111 permit udp any 172.16.1.3 0.0.0.0 eq 25 C: access-list 121 permit host 172.16.1.3 D: access-list 131 permit tcp any 172.16.1.3 0.0.0.0 eq 69
- 以下ACL语句中,含义为“允许172.168.0.0/24网络所有PC访问10.1.0.10中的FTP服务”的是______。 A: access-list 101 deny tcp 172.168.0.0 0.0.0.255 host 10.1.0.10 eq ftp B: access-list 101 permit tcp 172.168.0.0 0.0.0.255 host 10.1.0.10 eq ftp C: access-list 101 deny tcp host 10.1.0.10 172.168.0.0 0.0.0.255 eq ftp D: access-list 101 permit tcp host 10.1.0.10 172.168.0.0 0.0.0.255 eq ftp
- 下列命令中,正确的是 A: access-list 101 permit ip 172.16.1.3 0.0.0.0 any eq 23 B: access-list 111 deny ftp 172.16.1.3 0.0.0.0 any eq 21 C: access-list 121 permit host 172.16.1.3 any D: access-list 131 deny udp 172.16.1.3 0.0.0.0 any eq 53
- 网络管理员是Cisco路由器上配置访问控制列表,允许来自只的网络192.168.146.0,192.168.147.0,192.168.148.0和192.168.149.0主机。哪个结合是最好的完成任务,当两个ACL语句?() A: access-list 10 permit ip 192.168.147.0 0.0.0.255.255 B: access-list 10 permit ip 192.168.149.0 0.0.0.255.255 C: access-list 10 permit ip 192.168.146.0 0.0.0.0.255 D: access-list 10 permit ip 192.168.146.0 0.0.0.1.255 E: access-list 10 permit ip 192.168.148.0 0.0.0.1.255 F: access-list 10 permit ip 192.168.146.0 255.255.255.0
- 网络管理员需要配置标准 ACL,使得只有 IP 地址为 192.168.15.23 的管理员工作站能够访问主要路由器的虚拟终端。哪两个配置命令可以完成该任务?(选择两项) A: Router1(config) B: access-list 10 permit 192.168.15.23 0.0.0.0 C: Router1(config) D: access-list 10 permit 192.168.15.23 0.0.0.255 E: Router1(config) F: access-list 10 permit 192.168.15.23 255.255.255.0 G: Router1(config) H: access-list 10 permit 192.168.15.23 255.255.255.255 I: Router1(config) J: access-list 10 permit host 192.168.15.23