An inbound access list has been configured on a serial inter

题目
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.)()。
A

FTP

B

Telnet

C

SMTP

D

DNS

E

HTTP

F

POP3

参考答案和解析
正确答案: A,E
解析: 暂无解析
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相似问题和答案

第1题:

A company has a small network,consisting of a single switch and a single router.The switch has been configured with two vlans,and route-on-a-stick is being configured on the router for inter-vlan routing.A trunk is configured to connect the switch to the router.What is the minimum number of router subinterfaces that are required for all the vlans to communicate?()

A. one

B. three

C. two

D. zero


参考答案:C

第2题:

Router R1 has been configured for EIGRP. The configuratio n also includes an ACL with one line -access - list 1 permit 10.100.32.0 0.0.15.255 - and the EIGRP configuration includes the distribute -list 1 in command. Which of the following routes could not be displayed in the output of the show ip eigrp topology comm and as a result?()

  • A、10.10.32.0/19
  • B、10.10.44.0/22
  • C、10.10.40.96/27
  • D、10.10.48.0/23
  • E、10.10.60.0/30

正确答案:D,E

第3题:

Your ERX Edge Router is using an inbound route-map for an EBGP peer to only accept routes in the range of 192.168.32.0 through 192.168.95.255. The route-map references an access list named test .What accurately accomplishes the goal of the route-map?()

A. access-list test 192.168.32.0 0.0.63.255

B. access-list test permit 192.168.32.0 0.0.64.255

C. access-list test permit 192.168.32.0 0.0.63.255

D. access-list test permit 192.168.32.0 255.255.63.0


参考答案:C

第4题:

A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router,as the routing protocol for the network.Which statement about thisnetwork is true?()

  • A、For the two vlans to communicate,a network statement for the trunk interface needs to be added to the  OSPF configuration.
  • B、For the two vlans to communicate, a network statement for each subinterface needs to be  added  to the OSPF configuration.
  • C、Direct inter-vlan communication does not require OSPF
  • D、OSPF cannot be used if router-on-a-stick is configured on the router

正确答案:C

第5题:

Whenever a failover takes place on the ASA (configured for failover), all active connections are droppedand clients must re-establish their connections unless: ()

  • A、 The ASA is configured for Active-Standby failover.
  • B、 The ASA is configured for Active-Activefailover.
  • C、 The ASA is configured for Active-Active failover and a state failover link has been configured.
  • D、 The ASA is configured for Active-Standby failover and a state failover link has been configured.
  • E、 The ASA is configured to use a serial cable as the failover link.
  • F、 The ASA is configured for LAN-Based failover

正确答案:C,D

第6题:

Refer to the exhibit. Switch port FastEthernet 0/24 on AlSwitch1 will be used to create an IEEE 802.1Q- complaint trunk to another switch. Based on the output shown, What is the reason the trunk does not form, even thought the proper cabling has been attached?()

A.VLANs have not been created yet

B.An IP address must be configured for the port

C.The port is currently configured for access mode

D.The correct encapsulation type has not been configured

E.The no shutdown command has not been entered for the port


参考答案:C

第7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.)()。

  • A、FTP
  • B、Telnet
  • C、SMTP
  • D、DNS
  • E、HTTP
  • F、POP3

正确答案:D,E,F

第8题:

You wish to limit telnet access into your Cisco router to only a single host. In order to accomplish this, access list 1 has been written to allow host 172.16.1.224 access to the router vty lines.What command would assign this access- list to the Virtual Terminal Lines?()

A. router(config-line)# ip access-group 1 in

B. router(config-line)# access-class 1 in

C. router(config-line)# ip access-list 1 in

D. router(config-line)# access-line 1 in


参考答案:B

第9题:

Refer to the exhibit. Which statement is correct based on the show login command output shown?()

  • A、When the router goes into quiet mode, any host is permitted to access the router via Telnet,SSH, and HTTP,since the quiet-mode access list has not been configured.
  • B、The login block-for command is configured to block login hosts for 93 seconds.
  • C、All logins from any sources are blocked for another 193 seconds.
  • D、Three or more login requests have failed within the last 100 seconds.

正确答案:D

第10题:

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 192.168.13.26
  • B、Router# debug access-list 172
  • C、Router# show open ports 192.168.13.26
  • D、Router# show access-list
  • E、Router# show ip interface

正确答案:A,D,E

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