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

题目
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

相似考题

1.(22)下面的访问控制列表中，( )禁止所有TELNET访问子网10.10.1.0/24。A) access-list 15 deny udp any 10.10.1.0 255.255 255.0 eq 23B) access-list 115 deny tcp any 10.10.1.0 0.0.0.255 eq 23C) access-list 115 deny udp any 10.10.1.0 eq telnetD) access-list 15 deny telnet any 10.10.1.0 0.0.0.255 eq 23

2.以下的访问控制列表中，——禁止所有Telnet访问子网17．5．1．0／24。A．access—list 15 deny udp any 17．5．1．0 255．255．255．0 eq 23B．access—list 15 deny telnet any 17．5．1．0 255．255．255．0 eq 23C．access—list 15 deny tcp any 17．5．1．0 255．255．255．0 eq 23D．access—listl 15 deny any 17．5．1．O 255．255．255．0 eq telnet

3.以下的访问控制列表中，(37)语句用于禁止所有Telnet访问子网192.168.10.0/24。A．access-list 15 deny telnet any 192.168.10.0 0.0.0.255 eq 23B．access-listl 15 deny udp any 192.168.10.0 eq telnetC．access-list 1 15 deny tcp any 192.168.10.0 0.0.0.255 eq 23D．access-list 15 deny udp any 192.168.10.0 255.255.255.0 eq 23

4.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

参考答案和解析
参考答案：D, E, F
更多“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.)()。 ”相关问题

  • 第1题：

    利用扩展ACL禁止用户通过telnet访问子网202.112.111.0/24的命令是 （48） 。

    A.access-list 10 deny telnet any 202.112.110.0 0.0.0.255 eq 23

    B.access-list 110 deny udp any 202.112.110.0 eq telnet

    C.access-list 110 deny tcp any 202.112.110.0 0.0.0.255 eq23

    D.access-list 10 deny tcp any 202.112.110.0 255.255.255.0 eq23


    正确答案：C
    本题考查ACL配置命令的使用。首先，利用扩展ACL可排除A和D选项;其次B选项中使用了UDP．Telnet是基于TCP协议的，所以B选项错误。

  • 第2题：

    Your boss is learning a CCNA training course，refer to the exhibit.The access list has been configured on the S0/0 interface of router RTB in the outbound direction.Which two packets，if routed to the interface，will be denied？（）access-list 101 denytcp192.168.15.320.0.0.15any eq telnetaccess-list 101 permitip any any

    A.source ip address:192.168.15.5;destination port: 21

    B.source ip address:,192.168.15.37 destination port: 21

    C.source ip address:,192.168.15.41 destination port: 21

    D.source ip address:,192.168.15.36 destination port: 23

    E.source ip address:192.168.15.46;destination port: 23

    F.source ip address:,192.168.15.49 destination port: 23


    参考答案：D, E

  • 第3题：

    Which one of the access control list statements below will deny all telnet connections to subnet 10.10.1.0/24?（）

    • A、access-list 15 deny telnet any 10.10.1.0 0.0.0.255 eq 23
    • B、access-list 115 deny udp any 10.10.1.0 eq telnet
    • C、access-list 15 deny tcp 10.10.1.0 255.255.255.0 eq telnet
    • D、access-list 115 deny tcp any 10.10.1.0 0.0.0.255 eq 23
    • E、access-list 15 deny udp any 10.10.1.0 255.255.255.0 eq 23

    正确答案:D

  • 第4题：

    A network administrator wants to add a line to an access list that will block only Telnet access by the hosts on subnet 192.168.1.128/28 to the server at 192.168.1.5. What command should be issued to accomplish this task?（）

    • A、access-list 101 deny tcp 192.168.1.128 0.0.015 192.168.1.5 0.0.0.0 eq 23 access-list 101 permit ip any any
    • B、access-list 1 deny tcp 192.168.1.128 0.0.0.15 host 192.168.1.5 eq 23 access-list 1 permit ip any any
    • C、access-list 1 deny tcp 192.168.1.128 0.0.0.255 192.168.1.5 0.0.0.0 eq 21 access-list 1 permit ip any any
    • D、access-list 101 deny tcp 192.168.1.128 0.0.0.240 192.168.1.5 0.0.0.0 eq 23 access-list 101 permit ip any any
    • E、access-list 101 deny ip 192.168.1.128 0.0.0.240 192.158.1.5 0.0.0.0 eq 23 access-list 101 permit ip any any
    • F、access-list 101 deny ip 192.168.1.128 0.0.0.15 192.168.1.5 0.0.0.0 eq 23 access-list 101 permit ip any any

    正确答案:A

  • 第5题：

    A network administrator wants to add a line to an access list that will block only Telnet access by the hosts on subnet 192.168.1.128/28 to the server at 192.168.1.5.What command should be issued to accomplish this task？（）

    • A、access-list 101 deny tcp192.168.1.1280.0.0.15192.168.1.50.0.0.0eq23 access-list 101 permit ip any any
    • B、access-list 101 deny tcp192.168.1.1280.0.0.240192.168.1.50.0.0.0eq23 access-list101permit ip any any
    • C、access-list 1 deny tcp192.168.1.1280.0.0.255192.168.1.50.0.0.0eq21 access-list1permit ip any any
    • D、access-list 1 deny tcp192.168.1.1280.0.0.15host192.168.1.5eq23 access-list1permit ip any any

    正确答案:A

  • 第6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？（）

    • A、The traffic is dropped
    • B、The resulting action is determined by the destination IP address
    • C、The source IP address is checked，and，if a match is not found， traffic is routed out interface Serial 1
    • D、The resulting action is determined by the destination IP address and port number

    正确答案:A

  • 第7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.)（）

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

    正确答案:D,E,F

  • 第8题：

    A network administrator wants to add a line to an access list that will block only Telnet access by the hosts on subnet 192.168.1.128/28 to the server at 192.168.1.5. What command should be issued to accomplish this task?（）

    • A、access-list 101 deny tcp 192.168.1.128 0.0.0.15 192.168.1.5 0.0.0.0 eq 23  access-list 101 permit ip any any
    • B、access-list 101 deny tcp 192.168.1.128 0.0.0.240 192.168.1.5 0.0.0.0 eq 23  access-list 101 permit ip any any
    • C、access-list 1 deny tcp 192.168.1.128 0.0.0.255 192.168.1.5 0.0.0.0 eq 21  access-list 1 permit ip any any
    • D、access-list 1 deny tcp 192.168.1.128 0.0.0.15 host 192.168.1.5 eq 23  access-list 1 permit ip any any

    正确答案:A

  • 第9题：

    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.)（）
    A

    FTP

    B

    Telnet

    C

    SMTP

    D

    DNS

    E

    HTTP

    F

    POP3


    正确答案： B,E
    解析： 暂无解析

  • 第10题：

    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?（）
    A

    SMTP

    B

    DNS

    C

    FTP

    D

    Telnet

    E

    HTTP

    F

    POP3


    正确答案： B,E,F
    解析： 暂无解析

  • 第11题：

    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? （）
    A

    FTP

    B

    Telnet

    C

    SMTP

    D

    DNS

    E

    HTTP

    F

    POP3


    正确答案： C,E
    解析： 暂无解析

  • 第12题：

    单选题
    A network administrator wants to add a line to an access list that will block only Telnet access by the hosts on subnet 192.168.1.128/28 to the server at 192.168.1.5. What command should be issued to accomplish this task?（）
    A

    access-list 101 deny tcp 192.168.1.128 0.0.015 192.168.1.5 0.0.0.0 eq 23 access-list 101 permit ip any any

    B

    access-list 1 deny tcp 192.168.1.128 0.0.0.15 host 192.168.1.5 eq 23 access-list 1 permit ip any any

    C

    access-list 1 deny tcp 192.168.1.128 0.0.0.255 192.168.1.5 0.0.0.0 eq 21 access-list 1 permit ip any any

    D

    access-list 101 deny tcp 192.168.1.128 0.0.0.240 192.168.1.5 0.0.0.0 eq 23 access-list 101 permit ip any any

    E

    access-list 101 deny ip 192.168.1.128 0.0.0.240 192.158.1.5 0.0.0.0 eq 23 access-list 101 permit ip any any

    F

    access-list 101 deny ip 192.168.1.128 0.0.0.15 192.168.1.5 0.0.0.0 eq 23 access-list 101 permit ip any any


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Which one of the access control list statements below will deny all telnet connections to subnet 10.10.1.0／24?()

    A. access-list 15 deny telnet any 10.10.1.0 0.0.0.255 eq 23

    B. access-list 115 deny udp any 10.10.1.0 eq telnet

    C. access-list 15 deny tcp 10.10.1.0 255.255.255.0 eq telnet

    D. access-list 115 deny tcp any 10.10.1.0 0.0.0.255 eq 23

    E. access-list 15 deny udp any 10.10.1.0 255.255.255.0 eq 23


    参考答案：D

  • 第14题：

    利用高级ACL禁止用户通过telnet访问子网202.112.111.0/24的命令是（ ）。

    A.access-list 3000
    rule10 deny telnet any 202.112.111.0 0.0.0.255 ep 23
    B.access-list 3000
    rule 10 deny udp any 202.112.111.0 ep telnet
    C.access-list 3000
    rule 10 deny tcp any 202.112.111.0 0.0.0.255 ep 23
    D.access-list 3000
    rule 10 deny tcp any 202.112.111.0 255.255.255.0 ep 23

    答案：C
    解析：
    扩展 ACL（访问控制列表） 是一种路由器配置脚本，根据源地址、目的地址，以及协议或端口来控制路由器应该允许还是应该拒绝数据包。高级 ACL 比基本 ACL 更加灵活而且精度更高。

  • 第15题：

    下列语句中，（）是标准ACL。

    • A、access-list 50 deny 192.168.1.1 0.0.0.255
    • B、access-list 110 deny ip any any
    • C、access-list 2500 deny tcp any host 192.168.1.1 eq 22
    • D、access-list 101 deny tcp any host 192.168.1.1

    正确答案:A

  • 第16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17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?（）

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

    正确答案:B,E,F

  • 第18题：

    Which item represents the standard IP ACL?（）

    • A、access-list 50 deny 192.168.1.10.0.0.255
    • B、access-list 110 permitip any any
    • C、access-list 2500 deny tcp any host 192.168.1.1eq22
    • D、access-list 101 deny tcp any host 192.168.1.1

    正确答案:A

  • 第19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? （）

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

    正确答案:D,E,F

  • 第20题：

    单选题
    Which one of the access control list statements below will deny all telnet connections to subnet 10.10.1.0/24?（）
    A

    access-list 15 deny telnet any 10.10.1.0 0.0.0.255 eq 23

    B

    access-list 115 deny udp any 10.10.1.0 eq telnet

    C

    access-list 15 deny tcp 10.10.1.0 255.255.255.0 eq telnet

    D

    access-list 115 deny tcp any 10.10.1.0 0.0.0.255 eq 23

    E

    access-list 15 deny udp any 10.10.1.0 255.255.255.0 eq 23


    正确答案： A
    解析： 暂无解析

  • 第21题：

    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


    正确答案： B,C
    解析： 暂无解析

  • 第22题：

    单选题
    A network administrator wants to add a line to an access list that will block only Telnet access by the hosts on subnet 192.168.1.128/28 to the server at 192.168.1.5.What command should be issued to accomplish this task？（）
    A

    access-list 101 deny tcp192.168.1.1280.0.0.15192.168.1.50.0.0.0eq23 access-list 101 permit ip any any

    B

    access-list 101 deny tcp192.168.1.1280.0.0.240192.168.1.50.0.0.0eq23 access-list101permit ip any any

    C

    access-list 1 deny tcp192.168.1.1280.0.0.255192.168.1.50.0.0.0eq21 access-list1permit ip any any

    D

    access-list 1 deny tcp192.168.1.1280.0.0.15host192.168.1.5eq23 access-list1permit ip any any


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    A network administrator wants to add a line to an access list that will block only Telnet access by the hosts on subnet 192.168.1.128/28 to the server at 192.168.1.5. What command should be issued to accomplish this task?（）
    A

    access-list 101 deny tcp 192.168.1.128 0.0.0.15 192.168.1.5 0.0.0.0 eq 23 access-list 101 permit ip any any

    B

    access-list 101 deny tcp 192.168.1.128 0.0.0.240 192.168.1.5 0.0.0.0 eq 23 access-list 101 permit ip any any

    C

    access-list 1 deny tcp 192.168.1.128 0.0.0.255 192.168.1.5 0.0.0.0 eq 21 access-list 1 permit ip any any

    D

    access-list 1 deny tcp 192.168.1.128 0.0.0.15 host 192.168.1.5 eq 23 access-list 1 permit ip any any


    正确答案： B
    解析： 暂无解析

  • 第24题：

    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？（）
    A

    The traffic is dropped

    B

    The resulting action is determined by the destination IP address

    C

    The source IP address is checked，and，if a match is not found， traffic is routed out interface Serial 1

    D

    The resulting action is determined by the destination IP address and port number


    正确答案： C
    解析： 暂无解析

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