Switch R1 is configured to use the VLAN Trunking Protocol (VTP). What does R1 advertise in its VTP domain?()A、The VLAN ID of all known VLANs,the management domain name,and the total number of trunk links on the switch.B、The VLAN ID of all known VLANs,a 1-bit canonical format (CF1 Indicator),and the switch configuration revision number.C、The management domain name,the switch configuration revision number,the known VLANs, and their specific parameters.D、A 2-byte TPID with a fixed value of 0x8100 for the management domain number,the switch configuration revision number,the known VLANs,and their specific parameters.E、None of the other alternatives apply.
Switch R1 is configured to use the VLAN Trunking Protocol (VTP). What does R1 advertise in its VTP domain?()
- A、The VLAN ID of all known VLANs,the management domain name,and the total number of trunk links on the switch.
- B、The VLAN ID of all known VLANs,a 1-bit canonical format (CF1 Indicator),and the switch configuration revision number.
- C、The management domain name,the switch configuration revision number,the known VLANs, and their specific parameters.
- D、A 2-byte TPID with a fixed value of 0x8100 for the management domain number,the switch configuration revision number,the known VLANs,and their specific parameters.
- E、None of the other alternatives apply.
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将R1寄存器中的指定位bit0和bit3清零,以下ARM汇编指令正确的是()。A.AND R1,R1,0xFFFFFFF6B.BIC R1,R1,0xFFFFFFF6C.EOR R1,R1,0xFFFFFFF6D.ORR R1,R1,0xFFFFFFF6
阅读以下说明,回答问题1至问题3,将解答填入答题纸对应的解答栏内。 【说明】 某学校的网络拓扑结构图如图2-1所示。【问题1】(每空1分,共7分) 常用的 IP 访问控制列表有两种,它们是编号为(1)和 1300~1399 的标准访问控制列表和编为(2)和 2000~2699 的扩展访问控制列表、其中,标准访问控制列表是根据 IP 报的(3)来对 IP 报文进行过滤,扩展访问控制列表是根据 IP 报文的(4)、(5)、上层协议和时间等来对 IP 报文进行过滤。一般地,标准访问控制列表放置在靠近(6)的位置,扩展访问控制列表放置在靠近(7)的位置。 【问题2】(每空1分,共10分) 为保障安全,使用ACL对网络中的访问进行控制。访问控制的要求如下: (1)家属区不能访问财务服务器,但可以访问互联网; (2)学生宿舍区不能访问财务服务器,且在每天晚上18:00~24:00禁止访问互联网; (3)办公区可以访问财务服务器和互联网; (4)教学区禁止访问财务服务器,且每天8:00~18:00禁止访问互联网。 1.使用ACL对财务服务器进行访问控制,请将下面配置补充完整。 R1(config)access-list 1 (8) (9) 0.0.0.255 R1(config)access-Iist 1 deny 172.16.10.0 0.0.0.255 R1(config)access-list 1 deny 172.16.20.0 0.0.0.255 R1(config)access-Iist 1 deny (10) 0.0.0.255 Rl(config)mterface (11) R1(config-if)ip access-group 1 (12) 2.使用ACL对Internt进行访问控制,请将下面配置补充完整。 Route-Switch(config)time-range jxq ∥定义教学区时间范围 Route-Switch(config-tune-range) periodic daily (13) Route-Switch(config)time-range xsssq //定义学生宿舍区时间范围 Route-Switch(config-time-range)periodic (14) 18:00 t0 24:00 Route-Switch(config-time-range)exit Route-Switch(config)access-list 100 permit ip 172.16.10.0 0.0.0.255 any Route-Switch(config)access-list 100 permit ip 172.16.40.0 0.0.0.255 any Route-Switch(config)access-list 100 deny ip (15) 0.0.0.255 time-range jxq Route-Switch(corffig)access-list 100 deny ip (16) 0.0.0.255 time-range xsssq Route-Switch (config)interface (17) Route-Switch(config-if)ip access-group 100out 【问题3】(每空1分,共3分) 网络在运行过程中发现,家属区网络经常受到学生宿舍区网络的DDoS攻击,现对家属区网络和学生宿舍区网络之间的流量进行过滤,要求家属区网络可访问学生宿舍区网络,但学生宿舍区网络禁止访问家属区网络。 采用自反访问列表实现访问控制,请解释配置代码。 Route-Switch(config)ip access-hst extended infilter Route-Switch(config-ext-nacl)permit ip any 172.16.20.0 0.0.0.255 refiect jsq (18) Route-Switch(config-ext-nacl)exit Route-Switch(config)ip access-list extended outfilter Route-Switch(config-ext-nacl) evaluate jsq (19) Route-Switch(config-ext-nacl)exit Route-Switch(config)interface fastethernet 0/1 Route-Switch(config-if)ip access-group infilter in Route-Switch(config-if)ip access-group outfilter out //(20)
Switch R1 is configured with VTP. Which two VTP modes will make R1 capable of creating and deleting VLANs on itself? ()A、 ClientB、 ServerC、 TransparentD、 Pass-throughE、 No-negotiate
The VLANs in switch R1 are being modified. Which of the following are updated in R1 every time a VLAN is modified?()A、Configuration revision numberB、Configuration revision flag fieldC、Configuration revision reset switchD、Configuration revision databaseE、None of the other alternatives apply
Two directly connected routers, R1 and R2, are both configured for OSPF graceful restart. R2 is able to switch packets in hardware, but R1 is not. If a network administrator logs on to R2 and performs a system reload, which will be the result?()A、Traffic forwarded from R2 to or through R1 will continue to be forwarded based on the forwarding table state at the time of the reload.B、R2 will continue to forward traffic to R1, but R1 will drop the traffic because its neighbor adjacency with R2 has failed.C、R2 will continue forwarding traffic to and through R1, but R1 will drop this traffic because it is not capable of maintaining its forwarding state.D、All the traffic R2 is forwarding to or through R1 will be dropped while OSPF rebuilds its neighbor adjacency and forwarding tables.
Switch R1 has been configured with Private VLANs. With that type of PVLAN port should the default gateway be configured?()A、 TrunkB、 IsolatedC、 PrimaryD、 CommunityE、 PromiscuousF、 None of the other alternatives apply
You want to configure switch R1 to propagate VLAN information across the Company network using VTP. What must be configured on a Cisco switch in order to advertise VLAN information?()A、VTP modeB、VTP passwordC、VTP revision numberD、VTP pruningE、VTP domain nameF、None of the other alternatives apply
On a Company switch named R1 you configure the following: iparp inspection vlan 10-12, 15 What is the purpose of this global configuration command made on R1?()A、 Discards ARP packets with invalid IP-to-MAC address bindings on trusted portsB、 Validates outgoing ARP requests for interfaces configured on VLAN 10, 11, 12, or 15C、 Intercepts, logs, and discards ARP packets with invalid IP-to-MAC address bindingsD、 Intercepts all ARP requests and responses on trusted portsE、 None of the other alternatives apply
Switch R1 and R2 both belong to the Company VTP domain. What’s true about the switch operation in VTP domains?()A、A switch can only reside in one management domainB、A switch is listening to VTP advertisements from their own domain onlyC、A switch is listening to VTP advertisements from multi domainsD、A switch can reside in one or more domainsE、VTP is no longer supported on Catalyst switches
Switch R1 is part of the Company VTP domain. What’s true of VTP Pruning within this domain?()A、It does not prune traffic from VLANs that are pruning-ineligibleB、VLAN 1 is always pruning-eligibleC、It will prune traffic from VLANs that are pruning-ineligibleD、VLAN 2 is always pruning-ineligibleE、None of the other alternatives apply
If you were to set up a VLAN trunk over a Fast Ethernet link on switch R1, which trunk mode would you set the local port to on R1 if you wanted it to respond to requests from its link partner (R2) and become a trunk? ()A、 AutoB、 NegotiateC、 DesignateD、 No negotiate
When the Catalyst switch R1 is enabled to use VTP, which information does it advertise on its trunk ports?()A、 VTP modeB、 STP root statusC、 Negotiation statusD、 Management domainE、 Configuration revision number
单选题Switch R1 has been configured with Private VLANs. With that type of PVLAN port should the default gateway be configured?()A TrunkB IsolatedC PrimaryD CommunityE PromiscuousF None of the other alternatives apply
单选题Switch R1 is configured to use the VLAN Trunking Protocol (VTP). What does R1 advertise in its VTP domain?()AThe VLAN ID of all known VLANs,the management domain name,and the total number of trunk links on the switch.BThe VLAN ID of all known VLANs,a 1-bit canonical format (CF1 Indicator),and the switch configuration revision number.CThe management domain name,the switch configuration revision number,the known VLANs, and their specific parameters.DA 2-byte TPID with a fixed value of 0x8100 for the management domain number,the switch configuration revision number,the known VLANs,and their specific parameters.ENone of the other alternatives apply.
单选题If you were to set up a VLAN trunk over a Fast Ethernet link on switch R1, which trunk mode would you set the local port to on R1 if you wanted it to respond to requests from its link partner (R2) and become a trunk? ()A AutoB NegotiateC DesignateD No negotiate
单选题Two directly connected routers, R1 and R2, are both configured for OSPF graceful restart. R2 is able to switch packets in hardware, but R1 is not. If a network administrator logs on to R2 and performs a system reload, which will be the result?()ATraffic forwarded from R2 to or through R1 will continue to be forwarded based on the forwarding table state at the time of the reload.BR2 will continue to forward traffic to R1, but R1 will drop the traffic because its neighbor adjacency with R2 has failed.CR2 will continue forwarding traffic to and through R1, but R1 will drop this traffic because it is not capable of maintaining its forwarding state.DAll the traffic R2 is forwarding to or through R1 will be dropped while OSPF rebuilds its neighbor adjacency and forwarding tables.
多选题When the Catalyst switch R1 is enabled to use VTP, which information does it advertise on its trunk ports?()AVTP modeBSTP root statusCNegotiation statusDManagement domainEConfiguration revision number
单选题On a Company switch named R1 you configure the following: iparp inspection vlan 10-12, 15 What is the purpose of this global configuration command made on R1?()A Discards ARP packets with invalid IP-to-MAC address bindings on trusted portsB Validates outgoing ARP requests for interfaces configured on VLAN 10, 11, 12, or 15C Intercepts, logs, and discards ARP packets with invalid IP-to-MAC address bindingsD Intercepts all ARP requests and responses on trusted portsE None of the other alternatives apply
单选题You want to configure switch R1 to propagate VLAN information across the Company network using VTP. What must be configured on a Cisco switch in order to advertise VLAN information?()AVTP modeBVTP passwordCVTP revision numberDVTP pruningEVTP domain nameFNone of the other alternatives apply
多选题Switch R1 is configured with VTP. Which two VTP modes will make R1 capable of creating and deleting VLANs on itself? ()AClientBServerCTransparentDPass-throughENo-negotiate
单选题Switch R1 is part of the Company VTP domain. What’s true of VTP Pruning within this domain?()AIt does not prune traffic from VLANs that are pruning-ineligibleBVLAN 1 is always pruning-eligibleCIt will prune traffic from VLANs that are pruning-ineligibleDVLAN 2 is always pruning-ineligibleENone of the other alternatives apply
多选题Switch R1 and R2 both belong to the Company VTP domain. What’s true about the switch operation in VTP domains?()AA switch can only reside in one management domainBA switch is listening to VTP advertisements from their own domain onlyCA switch is listening to VTP advertisements from multi domainsDA switch can reside in one or more domainsEVTP is no longer supported on Catalyst switches
多选题The VLANs in switch R1 are being modified. Which of the following are updated in R1 every time a VLAN is modified?()AConfiguration revision numberBConfiguration revision flag fieldCConfiguration revision reset switchDConfiguration revision databaseENone of the other alternatives apply