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A firewall is a (1) ystem designed to (2) n organization's network against threats.
A.operating
B.programming
C.security
D.service
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下列程序段执行后,内存变量s1的值是( )。 S1="network" s1=stuff(s1,4,4,"BIOS") ?s1A.networkB.netBIOSC.netD.BIOS
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下面程序的运行结果是( )。 include main() {int a,s,n,m; a=2;s=0;n=1;m=1; while(m
下面程序的运行结果是( )。 include<stdio.h> main() {int a,s,n,m; a=2;s=0;n=1;m=1; while(m<=4){n=n*a;s=s+n;++m;} printf("s=%d",s); }
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The Testking Network consists of the following 5 IP networks:NETWORK 1: 192.168.10.0/26NETWORK 2: 192.168.10.64/27NETWORK 3: 192.168.10.96/27NETWORK 4: 192.168.10.128/30NETWORK 5: 192.168.10.132/30Which of the following routing protocols will support this IP addressing scheme?()A. RIP version 1B. RIP version 2C. IGRPD. EIGRPE. OSPFF. BGP
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Followingticketconsistsofaproblemdescriptionandexistingconfigurationonthedevice.Figure1Figure2TroubleTicketStatementClient1isnotabletoreachtheWebServer.InitialtroubleshootingshowsthatDSW1canpingtheFa0/1interfaceofR4butnotthes0/0/0/0.34interface.ConfigurationonDSW1routereigrp10network10.1.4.40.0.0.0network10.2.1.10.0.0.0network10.2.4.130.0.0.0noauto-summaryConfigurationonDSW2routereigrp10network10.1.4.80.0.0.0network10.2.2.10.0.0.0network10.2.4.140.0.0.0noauto-summaryConfigurationonR4routereigrp10network10.1.4.50.0.0.0noauto-summaryredistributeospf1metric1001025511500route-mapEIGRP_to_OSPF!routerospf1network10.1.1.80.0.0.0area34redistributeeigrp10subnets!route-mapEIGRPOSPFmatchipaddress1!access-list1permit10.0.0.00.255.255.255access-list1permit209.0.0.00.255.255.255Whatisthesolutionofthefaultcondition?()
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Which routing protocols will support the following IP addressing scheme? ()Network 1 - 192.168.10.0 /26Network 2 - 192.168.10.64 /27Network 3 - 192.168.10.96 /27Network 4 - 192.168.10.128 /30Network 5 - 192.168.10.132 /30A.RIP version 1B.RIP version 2C.IGRPD.EIGRPE.OSPF
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路由器R1的连接和地址分配如下图所示,如果在Rl上安装OSPF协议,运行下列命令:router ospf 100,则配置s0和E0端口的命令是——。A.network 192.100.10.4 0.0.0.3 area 0 network 192.1.0.128 0.0.0.63 area 1B.network 192.100.10.5 0.0.0.3 area0 network 192.1.0.129 0.0.0.63 area lC.network 192.100.10.5 255.255.255.252 area0 nework 192.1.0.129 255.255.255.192 area lD.network 192.100.10.4 255.255.255.252 area0 network 192.1.0.128 255.255.255.192 area 1
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下列程序段执行后,内存变量 s1 的值是s1= " network "s1=stuff(s1,4,4, " BIOS " )?s1A) networkB) netBIOSC)netD) BIOS
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某全国连锁企业的总部和分布在全国各地的30家分公司之间经常需要传输各种内部数据,因此公司决定在总部和各分公司之间建立VPN技术。具体拓扑如下:配置部分只显示了与总部与分公司1的配置。根据拓扑完成问题1-问题3。
[问题1](3分):在总部与分公司之间相连的VPN方式是(1),在IPsec工作模式中有传输模式和隧道模式,其中将源IP数据包整体封装后再进行传输的模式是(2).1备选答案:A.站点到站点 B.端到端C.端到站点[问题2](13分):请将相关配置补充完整。总部防火墙firewall1的部分配置如下。 (3)[FIREWALL1] interface(4)[FIREWALL1-GigabitEthernet1/0/2] ip address (5)[FIREWALL1-GigabitEthernet1/0/2] quit[FIREWALL1] interface GigabitEthernet 1/0/1[FIREWALL1-GigabitEthernet1/0/1] ip address 202.1.3.1 24[FIREWALL1-GigabitEthernet1/0/1] quit# 配置接口加入相应的安全区域。[FIREWALL1] firewall zone trust [FIREWALL1-zone-trust] add interface (6)[FIREWALL1-zone-trust] quit[FIREWALL1](7)[FIREWALL1-zone-untrust] add interface GigabitEthernet 1/0/1[FIREWALL1-zone-untrust] quit2. 配置安全策略,允许私网指定网段进行报文交互。# 配置Trust域与Untrust域的安全策略,允许封装前和解封后的报文能通过[FIREWALL1](8)[FIREWALL1-policy-security] rule name 1[FIREWALL1-policy-security-rule-1] source-zone (9)[FIREWALL1-policy-security-rule-1] destination-zone untrust[FIREWALL1-policy-security-rule-1] source-address (10)[FIREWALL1-policy-security-rule-1] destination-address 192.168.200.0 24[FIREWALL1-policy-security-rule-1] action (11)[FIREWALL1-policy-security-rule-1] quit…..# 配置Local域与Untrust域的安全策略,允许IKE协商报文能正常通过FIREWALL1。[FIREWALL1-policy-security] rule name 3[FIREWALL1-policy-security-rule-3] source-zone local[FIREWALL1-policy-security-rule-3] destination-zone untrust[FIREWALL1-policy-security-rule-3] source-address 202.1.3.1 32[FIREWALL1-policy-security-rule-3] destination-address 202.1.5.1 32[FIREWALL1-policy-security-rule-3] action permit[FIREWALL1-policy-security-rule-3] quit…3. 配置IPSec隧道。# 配置访问控制列表,定义需要保护的数据流。[FIREWALL1] (12)[FIREWALL1-acl-adv-3000] rule permit (13)[FIREWALL1-acl-adv-3000] quit# 配置名称为tran1的IPSec安全提议。[FIREWALL1] ipsec proposal tran1[FIREWALL1-ipsec-proposal-tran1] encapsulation-mode (14)[FIREWALL1-ipsec-proposal-tran1] transform esp[FIREWALL1-ipsec-proposal-tran1] esp authentication-algorithm sha2-256[FIREWALL1-ipsec-proposal-tran1] esp encryption-algorithm aes[FIREWALL1-ipsec-proposal-tran1] quit# 配置序号为10的IKE安全提议。[FIREWALL1] (15)[FIREWALL1-ike-proposal-10] authentication-method pre-share[FIREWALL1-ike-proposal-10] authentication-algorithm sha2-256[FIREWALL1-ike-proposal-10] quit# 配置IKE用户信息表。[FIREWALL1] ike user-table 1[FIREWALL1-ike-user-table-1] user id-type ip 202.1.5.1 pre-shared-key Admin@gkys[FIREWALL1-ike-user-table-1] quit# 配置IKE Peer。[FIREWALL1] ike peer b[FIREWALL1-ike-peer-b] ike-proposal 10[FIREWALL1-ike-peer-b] user-table 1[FIREWALL1-ike-peer-b] quit# 配置名称为map_temp序号为1的IPSec安全策略模板。[FIREWALL1] ipsec policy-template map_temp 1[FIREWALL1-ipsec-policy-template-map_temp-1] security acl 3000[FIREWALL1-ipsec-policy-template-map_temp-1] proposal tran1[FIREWALL1-ipsec-policy-template-map_temp-1] ike-peer b[FIREWALL1-ipsec-policy-template-map_temp-1] reverse-route enable[FIREWALL1-ipsec-policy-template-map_temp-1] quit# 在IPSec安全策略map1中引用安全策略模板map_temp。[FIREWALL1] ipsec policy map1 10 isakmp template map_temp# 在接口GigabitEthernet 1/0/1上应用安全策略map1。[FIREWALL1] interface GigabitEthernet 1/0/1[FIREWALL1-GigabitEthernet1/0/1] ipsec policy map1[FIREWALL1-GigabitEthernet1/0/1] quit [问题3]IPsec中,通过一些协议的处理,可以有效的保护分组安全传输。其中能够确保数据完整性,但是不能确保数据机密性的是(17),而技能报数数据传输的机密性又能保证数据完整性的是(18)
考题
4、 双绕组变压器一次、二次额定容量的关系是()。 A、S1N>S2N B、S1N=S2N C、S1N<S2N D、S1N≠S2NA.。B.。C.。D.。
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