On the serial interface of a router, an inbound access list is configured to deny all traffic from UDP and TCP ports 21, 23, and 25. All other traffic is permitted. Based on this information, which types of traffic will be allowed through this interface?（）A.SMTPB.DNSC.FTPD.TelnetE.HTTPF.POP3
On the serial interface of a router, an inbound access list is configured to deny all traffic from UDP and TCP ports 21, 23, and 25. All other traffic is permitted. Based on this information, which types of traffic will be allowed through this interface?（）
A.SMTP
B.DNS
C.FTP
D.Telnet
E.HTTP
F.POP3
相关考题：
拒绝转发所有IP地址进与出方向的、端口号为1434的UDP和端口号为4444的TCP数据包，下列正确的access-list配置是A）Router (config)#access-list 30 deny udp any any eq 1434Router (config)#access-list 30 deny tcp any any eq 4444Router (config)#access-list 30 permit ip any anyB）Router (config)#access-list 130 deny udp any any eq 1434Router (config)#access-list 130 deny tcp any any eq 4444Router (config)#access-list 130 permit ip any anyC）Router (config)#access-list 110 deny any any udp eq 1434Router (config)#access-list 110 deny any any tcp eq 4444Router (config)#access-list 110 permit ip any anyD）Router (config)#access-list 150 deny udp ep 1434 any anyRouter (config)#access-list 150 deny tcp ep 4444 any anyRouter (config)#access-list 150 permit ip any any
Cisco路由器执行show access-list命令显示如下一组信息 Standard IP access list block deny 10.0.0.0, wildcardbits 0.255.255.255 log deny 172.16.0.0, wildcard bits 0.15.255.255 permit any 根据上述信息，正确的access-list配置是A．Router (config) #access-list standard block Router (config-std-nacl) #deny 10.0.0.0 255.0.0.0 log Router (config-std-nacl) #deny 172.16.0.0 255.240.0.0 Router (config-std-nacl) #permit anyB．Router (config) #ip access-list standard block Router (config-std-nacl) #permit any Router (config-std-nacl) #deny 10.0.0.0 0.255.255.255 log Router (config-std-nacl) #deny 172.16.0.0 0.15.255.255C．Router (config) #ip access-list standard block Router (config-std-nacl) #deny 10.0.0.0 255.0.0.0 log Router (config-std-nacl) #deny 172.16.0.0 255.240.0.0 Router (config-std-nacl) #permit anyD．Router (config) #ip access-list standard block Router (config-std-nacl) #deny 10.0.0.0 0.255.255.255 log Router (config-std-nacl) #deny 172.16.0.0 0.15.255.255 Router (config-std-nacl) #permit any
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______。A) Router(config)#access-list 110 permit icmp 212.78.170.166 0.0.0.0 anyRouter(config)#access-list 110 deny icmp any anyRouter(config)#access-list 110 permit ip any anyB) Router(config)#access-list 110 permit icmp 212.78.170.0 255.255.255.224 anyRouter(config)#access-list 110 permit ip any anyRouter(config)#access-list 110 deny icmp any anyC) Router(config)#access-list 110 perimt iemp 212.78.170.0 0.0.0.255 anyRouter(config)#access-list 110 deny icmp any anyRouter(config)#access-list 110 permit ip any anyD) Router(config)#access-list 110 permit icmp 212.78.170.160 0.0.0.31 anyRouter(config)#access-list 110 deny icmp any anyRouter(config)#access-list 110 permit ip any anyA．B．C．D．
Cisco路由器执行show access-list命令显示如下一组控制列表信息：Standard IP acceSS list 30deny 127.0.0.0，wildcard bits 0.255.255.255deny 172.16.0.0，wiidcard bits 0.15.255.255permft any根据上述信息，正确的access-list配置是______。A) Router(config)#access-list 30 deny 127.0.0.0 255.255.255.0Router(config)#access-list 30 deny 172.16.0.0 255.240.0.0Router(config)#access-list 30 permit anyB) Router(config-std-nacl)#access-list 30 deny 127.0.0.0 0.255.255.255Router(config-std-nael)#access-list 30 deny 172.16.0.0 0.15.255.255Router(config-std-nacl)#access-list 30 permit anyC) Router(config)#access-list 30 deny 127.0.0.0 0.255.255.255Router(config)#access-list 30 deny 172.16.0.0 0.15.255.255Router(config)#access-list 30 permit anyD) Router(config)#access-list 30 deny 127.0.0.0 0.255.255.255Router(config)#access-list 30 permit anyRouter(config)#access-list 30 deny 172.16.0.0 0.15.255.255A．B．C．D．
Refer to the exhibit. Routers R1 and R2 have established a neighbor relationship and are exchanging routing information. The network design requires that R1 r eceive routing updates from R2, but not advertise any routes to R2. Which configuration command sequence will successfully accomplish this task? （）A. R1(config)# router eigrp 1 R1(config - router)# passive - interface serial 0B. R1(config)# access - list 2 0 deny any R1(config)# router eigrp 1 R1(config - router)# distribute - list 20 out serial 0C. R2(config)# access - list 20 permit any R2(config)# router eigrp 1 R2(config - router)# distribute - list 20 in serial 0D. R1(config)# access - list 20 permit any R 1(config)# router eigrp 1 R1(config - router)# distribute - list 20 in serial 0E. R2(config)# access - list 20 deny any R2(config)# router eigrp 1 R2(config - router)# distribute - list 20 out serial 0F. R2(config)# router eigrp 1 R2(config - router)# passive - interface serial 0
Refer to the exhibits. Router B should advertise the network co nnected to the E0/0/0 interface to router A and block all other network advertisements. The IP routing table on router A indicates that it is not receiving this prefix from router B. What is the probable cause of the problem?（）A. An access list on router B is causing the 192.168.3.16/28 network to be deniedB. An access list on router B is causing the 192.168.3.32/28 network to be deniedC. The distribute list on router B is referencing a numbered access list that does not exist on router BD. The d istribute list on router B is referencing the wrong interface
Which of the following access list statements would deny traffic from a specifichost?() A. Router(config)# access-list 1 deny 172.31.212.74 anyB. Router(config)# access-list 1 deny 10.6.111.48 hostC. Router(config)# access-list 1 deny 172.16.4.13 0.0.0.0D. Router(config)# access-list 1 deny 192.168.14.132 255.255.255.0E. Router(config)# access-list 1 deny 192.168.166.127 255.255.255.255
As a network administrator, you have been instructed to prevent all traffic originating on the LAN from entering the R2 router. Which the following command would implement the access list on the interface of the R2 router?（）A.access-list 101 inB.access-list 101 outC.ip access-group 101 inD.ip access-group 101 out
Which of the following access list statements would deny traffic from a specifichost?（）A、Router(config)# access-list 1 deny 172.31.212.74 anyB、Router(config)# access-list 1 deny 10.6.111.48 hostC、Router(config)# access-list 1 deny 172.16.4.13 0.0.0.0D、Router(config)# access-list 1 deny 192.168.14.132 255.255.255.0E、Router(config)# access-list 1 deny 192.168.166.127 255.255.255.255
An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports 21, 23 and 25. What types of packets will be permitted by this ACL (Choose three.)（）。A、FTPB、TelnetC、SMTPD、DNSE、HTTPF、POP3
On your newly installed router, you apply the access list illustrated below to interface Ethernet 0 on a Cisco router. The interface is connected to the 192.168.1.8/29 LAN. access-list 123 deny tcp 192.168.166.18 0.0.0.7 eq 20 any access-list 123 deny tcp 192.168.166.18 0.0.0.7 eq 21 any How will the above access lists affect traffic?（）A、All traffic will be allowed to exit E0 except FTP traffic.B、FTP traffic from 192.168.166.19 to any host will be denied.C、FTP traffic from 192.168.166.22 to any host will be denied.D、All traffic exiting E0 will be denied.E、All FTP traffic to network 192.168.166.18/29 from any host will be denied.
Which of the following statements regarding the use of multiple access lists are valid when configuring a single interface on a Cisco router?（）A、Application of up to three access lists per protocol to a single interface.B、No more than two access lists per interface.C、One access list may be configured per direction for each Layer 3 protocol configured on an interface.D、The maximum number allowed varies due to RAM availability in the router.E、An infinite number of access lists that can be applied to an interface, from most specific to most general.F、Cisco IOS allows only one access list to an interface.
A standard IP access list is applied to an Ethernet interface of a router. What does this standard access list filter on?（）A、The source and destination addressesB、The destination port numberC、The destination addressD、The source addressE、All of the above
What is the purpose of this command? ip route 0.0.0.0 0.0.0.0 serial0/0（）A、It configures a router to send all packets out interface serial 0/0.B、It configures a router to block routing updates from being sent out interface serial 0/0.C、It configures a router as a firewall, blocking all unauthorized packets from exiting serial 0/0.D、It configures a router to send all packets for unknown destination networks out interface serial 0/0.E、It configures a router to drop all packets for which the destination network is unknown.
A network administrator has configured access list 172 to prevent Telnet and ICMP traffic from reaching a server with the address if 192.168.13.26. Which command can the administrator issue to verify that the access list is working properly?（）A、Router# ping 192.168.13.26B、Router# debug access-list 172C、Router# show open ports 192.168.13.26D、Router# show access-listE、Router# show ip interface
On the serial interface of a router, an inbound access list is configured to deny all traffic from UDP and TCP ports 21, 23, and 25. All other traffic is permitted. Based on this information, which types of traffic will be allowed through this interface?（）A、SMTPB、DNSC、FTPD、TelnetE、HTTPF、POP3
A standard access control list has been configured on a router and applied to interface Serial 0 in anoutbound direction. No ACL is applied to Interface Serial 1 on the same router. What will happen whentraffic being filtered by the access list does not match the configured ACL statements for Serial 0？（）A、The traffic is droppedB、The resulting action is determined by the destination IP addressC、The source IP address is checked，and，if a match is not found， traffic is routed out interface Serial 1D、The resulting action is determined by the destination IP address and port number
As a network administrator, you have been instructed to prevent all traffic originating on the LAN from entering the R2 router. Which the following command would implement the access list on the interface of the R2 router?（）A、access-list 101 inB、access-list 101 outC、ip access-group 101 inD、ip access-group 101 out
An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports21, 23 and 25. What types of packets will be permitted by this ACL? (Choose three.)（）A、FTPB、TelnetC、SMTPD、DNSE、HTTPF、POP3
An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports 21, 23 and 25. What types of packets will be permitted by this ACL? （）A、FTPB、TelnetC、SMTPD、DNSE、HTTPF、POP3
多选题An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports21, 23 and 25. What types of packets will be permitted by this ACL? (Choose three.)（）AFTPBTelnetCSMTPDDNSEHTTPFPOP3
单选题Which of the following statements regarding the use of multiple access lists are valid when configuring a single interface on a Cisco router?（）AApplication of up to three access lists per protocol to a single interface.BNo more than two access lists per interface.COne access list may be configured per direction for each Layer 3 protocol configured on an interface.DThe maximum number allowed varies due to RAM availability in the router.EAn infinite number of access lists that can be applied to an interface, from most specific to most general.FCisco IOS allows only one access list to an interface.
多选题An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports 21, 23 and 25. What types of packets will be permitted by this ACL (Choose three.)（）。AFTPBTelnetCSMTPDDNSEHTTPFPOP3
多选题On the serial interface of a router, an inbound access list is configured to deny all traffic from UDP and TCP ports 21, 23, and 25. All other traffic is permitted. Based on this information, which types of traffic will be allowed through this interface?（）ASMTPBDNSCFTPDTelnetEHTTPFPOP3
多选题An inbound access list has been configured on a serial interface to deny packet entry for TCP and UDP ports 21, 23 and 25. What types of packets will be permitted by this ACL? （）AFTPBTelnetCSMTPDDNSEHTTPFPOP3
单选题How would you characterize the source and type in a denial of service attack on a router？（）ABy perfornubg a show ip interface to see the type and source of the attack based upon the access-listmatchesBBy performing a show interface to see the transmitted load txload and receive load rxload ；if the interface utilization is not maxed out ，there is no attack underwayCBy setting up an access-list to permit all ICMP，TCP，and UDP traffic with the log or log-input commands，then use the show access-list and show log commands to determine the type and sourceof attackDBy applying an access-list to all incoming and outgoing interfaces，turning off route-cache on all interfaces，then，when telnetting into the router perform a debug IP packet detail
单选题What is the purpose of this command? ip route 0.0.0.0 0.0.0.0 serial0/0（）AIt configures a router to send all packets out interface serial 0/0.BIt configures a router to block routing updates from being sent out interface serial 0/0.CIt configures a router as a firewall, blocking all unauthorized packets from exiting serial 0/0.DIt configures a router to send all packets for unknown destination networks out interface serial 0/0.EIt configures a router to drop all packets for which the destination network is unknown.
单选题A standard access control list has been configured on a router and applied to interface Serial 0 in anoutbound direction. No ACL is applied to Interface Serial 1 on the same router. What will happen whentraffic being filtered by the access list does not match the configured ACL statements for Serial 0？（）AThe traffic is droppedBThe resulting action is determined by the destination IP addressCThe source IP address is checked，and，if a match is not found， traffic is routed out interface Serial 1DThe resulting action is determined by the destination IP address and port number