CCNA2
REVERSE
JEOPARDY
Chapter 1
SW
Start-up
Routing
table
Router
parts
Choosing
a path
Addressing
Pot luck
►►► Final Jeopardy ◄◄◄
100
100
100
100
100
100
200
200
200
200
200
200
300
300
300
300
300
300
400
400
400
400
400
400
500
500
500
500
500
500
SW
100 Start-up
• What does a router do immediately after
running its POST?（在POST完成后，路
由器紧接着要做什么？）
• Loads and runs its bootstrap program
SW
200 Start-up
• Where does a router store its POST
instructions and bootstrap program ?
（路由器的POST指令和bootstrap程序存放
在哪里？）
• In ROM
SW
300 Start-up
• What is the main task of the bootstrap
program ?（Bootstrap程序的主要任务是
什么？）
• Locate the IOS and load it into RAM
SW
400 Start-up
• After loading its IOS, what other file does
a router normally try to locate and load ?
（在加载完IOS后，路由器通常要去定位
和加载哪个其他的文件？）
• The startup configuration
SW
500 Start-up
• What are the two places where a router
will look for its IOS ?（路由器将在哪两个
地方寻找IOS？）
• Flash memory and on a TFTP server
SW
100 Routing table
• Where does a router store its routing
table ?（路由器在哪里存放路由表？）
• In RAM
SW
200 Routing table
• How does a static route get into the
routing table ?（静态路由如何进入路由
表中？）
• Configured by an administrator
SW
300 Routing table
• How does a directly connected route get
into the routing table ?（直连路由如何出
现在路由表中？）
• From the router’s own interface
configuration
SW
400 Routing table
• How does a dynamic route get into the
routing table ? （动态路由如何出现在路
由表中？）
• Learned from another router
SW
500 Routing table
• Which command will show the routing
table ?（哪个命令用来查看路由表？）
• Show ip route
SW
100 Router parts
• Where does a router store its IOS in the
long term ?（路由器一般把IOS保存在哪
里？）
• Flash memory
SW
200 Router parts
• Where does a router store its startup
configuration ?（路由器的启动配置文件
保存在哪里？）
• In NVRAM
SW
300 Router parts
• Which router interface is used for initial
configuration of the router ?（初始配置路
由器需要用哪个接（端）口？）
• Console port
SW
400 Router parts
• What is the purpose of the router’s AUX
interface ?（路由器的AUX端口做什么
用？）
• It is used for configuration, often via a
modem
SW
500 Router parts
• Name three items that a router stores in
its ROM ?（哪三个内容存储在路由器的
ROM中？）
• POST instructions. Bootstrap program.
Basic IOS for emergency use
SW
100 Choosing a path
• Which routing metric is used by the RIP
routing protocol ?（RIP路由协议使用哪
个路由度量值？）
• Hop count
SW
200 Choosing a path
• What does the OSPF routing protocol
use to calculate its routing metric ?
（OSPF路由协议使用什么来计算路由度
量？）
• The bandwidth of the links
SW
300 Choosing a path
• If a routing protocol finds more than one
path to a destination, which path goes
into the routing table ?（如果一个路由协
议发现到同一个目标网络有多条路径，那
么哪条路由放到路由表中？）
• The path with the lowest metric
SW
400 Choosing a path
• What is equal cost load balancing ?（什
么是等价均衡负载？）
• If a routing protocol finds two different
paths with the same cost then they can
both be used.
SW
500 Choosing a path
• What is the disadvantage of using hop
count as the only metric?（使用跳数作为
度量值的缺点是什么？）
• The path with the fewest hops may not
be the most efficient path. There may be
a path with more hops but having links
with higher bandwidth
SW
100 Addressing
• Which layer 2 destination address will a
PC put in a frame when it encapsulates a
packet for a remote network ?（对于到
达远程网络的数据包，PC在它的帧中封
装的第2层目的地址是谁的？）
• The layer 2 address of the default
gateway
SW
200 Addressing
• How do you configure the IP address
192.168.1.254/24 on to the Fa0/0 port of
a router starting at Global configuration
mode ?（如何从路由器的全局配置模式
开始配置一个IP地址为192.168.1.254/24
的F0/0接口？）
• Interface fa0/0
ip address 192.168.1.254 255.255.255.0
SW
300 Addressing
• Which addresses stay the same and
which addresses change as packets
move across networks ?（数据包跨越网
络时，哪个地址是不变的，哪个地址是改
变的？）
• IP addresses stay the same (leaving out
the effects of NAT).
Layer 2 addresses change for each hop
SW
400 Addressing
• Ethernet frames include full layer 2 destination
and source MAC addresses. Why do HDLC
and PPP frames not include full layer 2
addressing ?（以太网帧不含完整的第2层源和
目的MAC地址。为什么HDLC和PPP帧中不包
括全部的第2层地址？）
• HDLC and PPP are used on WAN point to
point links where there is only one possible
destination
SW
500 Addressing
• How does a PC know whether to put the
destination host’s MAC address or the default
gateway’s MAC address in a frame ?（PC如何
来决定第2层目的MAC地址是主机的MAC还是
缺省网关的MAC地址？）
• It does a logical AND on its own IP address and subnet
mask to find its own network address. It does a logical
AND on the destination IP address and its subnet
mask. If the result is the same then the destination host
is on the same network and the frame should be
addressed directly to the destination host.
SW
100 Pot Luck
• Which mode is a router in when you first
make a console connection with it ?（第
一次从console进入路由器，遇到的是哪
个模式？）
• User exec mode
SW
200 Pot Luck
• Which router mode do you go to by
typing the enable command ?（输入
enable命令进入到哪个模式？）
• Privileged exec mode
SW
300 Pot Luck
• What is the purpose of the description
command that you enter when
configuring an interface ?（在接口配置
description命令的目的是什么？）
• It is for documentation, to describe the
purpose and features of the interface. It
does not affect router operation
SW
400 Pot Luck
• When you first configure an interface,
what command do you have to give in
addition to the ip address command ?
（在你第一次配置接口时，除了配置IP地
址，还需要哪个额外的命令？）
• No shutdown
SW
500 Pot Luck
• Which router command saves the
current configuration into NVRAM ?（路
由器保存配置的命令是什么？）
• Copy running-config startup-config (copy
run start
SW
Final Jeopardy
• Two different routing protocols are running.
They find different routes to the same network.
Which routing protocol will get its route put into
the routing table ?（有两个路由协议在运行，
它们到同一目标网络有不同的路由。哪个路由
协议的路由被放到路由表中？）
• The one with the lower administrative distance
SW