某大型思科金牌集成商的售后网络工程师转正考核试题分享（科目二）

转正考核（科目二）

得 分 表	1	2	3	4	5	6	7	8	9	姓名
	ACE	A	B	A	A	A	E	B	A
	10	11	12	13	14	15	16	17	18
	BCD	C	D	D	D	CE	B	C	B	总分
	19	20	21	22	23	24	25
	BE	C	题目不完整	AC		BD
备注：考试时间：120分钟（每超过一分钟扣一分） / 满分：100分（60分合格） / 所有命令均可使用简写 / 所有Reason及步骤必须写出不然不得分，均可用中文回答。 注意：实验题评分将会从细节入手，请注重质量而不是速度，谢谢。

日期：______________ 阅卷人签名：_____________

第一部分：选择题（24*2%=48%）

QUESTION 1

Which of the following describes the roles of devices in a WAN? (Choose three.)

A. A CSU/DSU terminates a digital local loop. B. A modem terminates a digital local loop.

C. A CSU/DSU terminates an analog local loop. D. A modem terminates an analog local loop.

E. A router is commonly considered a DTE device. F. A router is commonly considered a DCE device.

Correct Answer: ACE

Reason:CSU/DSU本终端用户和本地数字电话相连，是本地数字环路

modem是模拟设备；

在广域网中，R通常只作为DTE设备的，就是终端设备，不配置clock rate

计算时间，肯定是电信算的，所以路由器是终端设备

QUESTION 2

A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the network administrator is using for this operation?

A. application B. presentation C. session D. transport E. internet F. data link

Correct Answer: A

Reason:网络管理员使用此操作的最高层是，用TFTP软件，属于应用层

QUESTION 3

Where does routing occur within the DoD TCP/IP reference model?

A. application B. internet C. network D. transport

Correct Answer: B

Reason:网络层在DOD的术语是

DoD OSI

过程/应用层 应用层、表示层、会话层

主机到主机层 传输层

因特网层 网络层

网络接入层 数据链路层、物理层

QUESTION 4

What is the function of the command switchport trunk native vlan 999 on a Cisco Catalyst switch?

A. It creates a VLAN 999 interface. B. It designates VLAN 999 for untagged traffic.

C. It blocks VLAN 999 traffic from passing on the trunk.

D. It designates VLAN 999 as the default for all unknown tagged traffic.

Correct Answer: A

Reason:在思科交换机上输入命令vlan 999 的作用是 A 创建vlan999 接口

QUESTION 5

Which switch would STP choose to become the root bridge in the selection process?

A. 32768: 11-22-33-44-55-66 B. 32768: 22-33-44-55-66-77

C. 32769: 11-22-33-44-55-65 D. 32769: 22-33-44-55-66-78

Correct Answer:A

Reason: 选根网桥 选优先级，再比较MAC地址

AB的优先级比CD小1，AB 优先级相同，再选择MAC地址小的那个

QUESTION 6

Which two commands can be used to verify a trunk link configuration status on a given Cisco switch interface? (Choose two.)

A. show interface trunk B. show interface interface C. show ip interface brief D. show interface vlan

E. show interface switchport

Correct Answer: AE

Reason:查看trunk 状态的2个命令是什么

QUESTION 7

Which command enables RSTP on a switch?

A. spanning-tree uplinkfast B. spanning-tree mode rapid-pvst

C. spanning-tree backbonefast D. spanning-tree mode mst

Correct Answer: B

Reason:在交换机上如何启用RSTP

QUESTION 8

At which layer of the OSI model is RSTP used to prevent loops?

A. physical B. data link C. network D. transport

Correct Answer: B

Reason:RSTP协议工作OSI七层模型在那一层，数据链路层

QUESTION 9

Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the same LAN?

A. pingaddress B. tracertaddress C. tracerouteaddress D. arpaddress

Correct Answer: A

Reason:PC之间的连通性测试，ping地址

QUESTION 10

Which are valid modes for a switch port used as a VLAN trunk? (Choose three.)

A. transparent B. auto C. on D. desirable E. blocking F. forwarding

Correct Answer: BCD

Reason: vlan trunk 的端口模式有哪三种 就是auto，des，on

QUESTION 11

An administrator must assign static IP addresses to the servers in a network. For network 192.168.20.24/29, the router is assigned the first usable host address

while the sales server is given the last usable host address. Which of the following should be entered into the IP properties box for the sales server?

A. IP address: 192.168.20.14 Subnet Mask: 255.255.255.248 Default Gateway: 192.168.20.9

B. IP address: 192.168.20.254 Subnet Mask: 255.255.255.0 Default Gateway: 192.168.20.1

C. IP address: 192.168.20.30 Subnet Mask: 255.255.255.248 Default Gateway: 192.168.20.25

D. IP address: 192.168.20.30 Subnet Mask: 255.255.255.240 Default Gateway: 192.168.20.17

E. IP address: 192.168.20.30 Subnet Mask: 255.255.255.240 Default Gateway: 192.168.20.25

Correct Answer: C

Reason:192.168.20.24/29 的最后一个可用地址给销售服务器，求此地址C

QUESTION 12

Which subnet mask would be appropriate for a network address range to be subnetted for up to eight LANs, with each LAN containing 5 to 26 hosts?

A. 0.0.0.240 B. 255.255.255.252 C. 255.255.255.0 D. 255.255.255.224 E. 255.255.255.240

Correct Answer: D

Reason:8个子网 ，5-26台主机，27位子网掩码 刚刚好

QUESTION 13

Which option is a valid IPv6 address?

A. 2001:0000:130F::099a::12a B. 2002:7654:A1AD:61:81AF:CCC1

C. FEC0:ABCD:WXYZ:0067::2A4 D. 2004:1:25A4:886F::1

Correct Answer: D

Reason:IPV6地址，格式 A错，有2个：： B才6段 一共有8段

C 16进制0-F，没有XYWZ

QUESTION 14

The network administrator is asked to configure 113 point-to-point links. Which IP addressing scheme defines the address range and subnet mask that meet the

requirement and waste the fewest subnet and host addresses?

A. 10.10.0.0/16 subnetted with mask 255.255.255.252

B. 10.10.0.0/18 subnetted with mask 255.255.255.252

C. 10.10.1.0/24 subnetted with mask 255.255.255.252

D. 10.10.0.0/23 subnetted with mask 255.255.255.252

E. 10.10.1.0/25 subnetted with mask 255.255.255.252

Correct Answer: D

Reason:113个对点通讯，浪费最少的IP主机地址

要建立113个链路，一个点到点链路需要占用4个地址，所以113需要452个地址，D中的掩码是23位的，所以主机地址有2的9次方个，即512个，正好比452大，又最接近452，

QUESTION 15

If IP routing is enabled, which two commands set the gateway of last resort to the default gateway? (Choose two.)

A. ip default-gateway 0.0.0.0 B. ip route 172.16.2.1 0.0.0.0 0.0.0.0 C. ip default-network 0.0.0.0

D. ip default-route 0.0.0.0 0.0.0.0 172.16.2.1 E. ip route 0.0.0.0 0.0.0.0 172.16.2.1

Correct Answer:CE

Reason:设置默认网关，网关为0.0.0.0 ,所有去往0.0.0.0的数据包都走172.16.2.1

QUESTION 16

Which command would you use on a Cisco router to verify the Layer 3 path to a host?

A. tracert address B. traceroute address C. telnet address D. ssh address

Correct Answer: B

Reason:用哪个命令在一台路由器上 验证3层已经通了

QUESTION 17

What is the default administrative distance of OSPF?

A. 90 B. 100 C. 110 D. 120

Correct Answer: C

Reason:OSPF的管理距离

QUESTION 18

Which command would you configure globally on a Cisco router that would allow you to view directly connected Cisco devices?

A. enable cdp B. cdp enable C. cdp run D. run cdp

Correct Answer: B

Reason:如何看到直连路由的信息，启动CDP协议

QUESTION 19

Which commands are required to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0? (Choose two.)

A. Router(config)# router ospf 0 B. Router(config)# router ospf 1 C. Router(config)# router ospf area 0

D. Router(config-router)# network 192.168.16.0 0.0.0.255 0

E. Router(config-router)# network 192.168.16.0 0.0.0.255 area 0

F. Router(config-router)# network 192.168.16.0 255.255.255.0 area 0

Correct Answer: BE

Reason:启动OSPF 的命令 并在区域0通告192.168.16.0

QUESTION 20

Which commads we know the imformation of the router about last reload?

A. show reload B. show boot C. show running-config D. show version

Correct Answer: C

Reason:查看路由器最近一次启动的信息

QUESTION 21

After the router got a new hostname where

• NVRAM B. RAM C.FlASH D.ROM D.PCMCIA
  
  Correct Answer:
  Reason:题目不完整，无法判断
  A：断电 不会丢失
  B 断电丢失
  C：存IOS
  D:固话硬件，包裹bootstrp，引导等
  QUESTION 22
  Now we have the network 192.168.20.19/28，which two is include?
  A.192.168.20.29 B.192.168.20.16 C.192.168.20.17 D.192.168.20.31 E.192.168.20.0
  Correct Answer: AC
  Reason:通告了192.168.20.19 /28位的网段 包括下面哪2段
  题目错误，如果包括 应该选ABCD ，可用为AC
  原题：
  80. Given the address 192.168.20.19/28, which of the following are valid host addresses on this subnet
  (Choose two.)
  A. 192.168.20.29
  B. 192.168.20.16
  C. 192.168.20.17
  D. 192.168.20.31
  E. 192.168.20.0
  Answer: AC
  QUESTION 23
  Fill in the right cable requirements in the form(Crossover or Straight-through)

  Connection	Required cable
  Switch to switch	交叉线
  Switch to router	直连线
  Router to router	交叉线

  
  
  Reason:同交异直
  QUESTION 24
  The subnet mask is 255.255.254.0, which two of below is a PC ip address ?
  A.113.10.4.0 B.186.54.3.0 C.175.33.3.255 D.26.35.2.255 E.17.35.36.0
  Correct Answer: BD
  Reason:掩码为23位，主机位不为全1或者全0
  第二部分：实验(52%)
  25. 现有cisco1841设备一台，请配置该设备并且更换IOS文件。（20%）配置（examination.txt）在路由器的flash中，请配置（写出配置步骤）并且纠错（10%）。（1小时）
  （1）请写出错点。（9%）
  （2）该如何修改（写出修改命令）。（9%）
  另外请制作3米网线2跟（1根正跳线1根反跳线）。（30分钟）（4%）
  1首先先备份路由器原操作系统，万一升级失败可以导回去
  2.必须ping得通,两边配置同一网段IP
  3.看硬盘空间是否够大不 show flash
  4.如果不够大，删掉原来的操作系统，升级的过程中千万不要断电重启
  R1#show flash
  查看空间是否足够大
  R1#copy tftp flash
  Address or name of remote host []? 192.168.1.1
  Source filename []? ceshi.bin
  Destination filename [ceshi.bin]?
  Accessing tftp://192.168.1.1/11.bin...
  %Error opening tftp://192.168.1.1/11.bin (Socket error)
  升级完成之后再看flash 是否为新版本
  R1#show flash
  
  

看帖看完了至少要顶一下！

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