Download 1 Which of the following devices can we use to segment our lan

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1 Which of the following devices can we use to segment our LAN? (choose three answers)
C、D、E
(A) Hubs
(B) Repeaters
(C) Bridges
(D) Switches
(E) Routers
(F) Conference Servers
2 We use a router to segment our network. Which of the following benefits can we get?
(choose two answers)
A、D
(A) Filtering can occur based on Layer 3 information.
(B) Adding a router to the network can decrease latency.
(C) Routers are more efficient than switches and they can process the data more quickly.
(D) Broadcasts are not forwarded across the router.
(E) All Broadcasts are completely eliminated
3 Which of the following functions do routers perform? (choose three answers)
A、C、F
(A) Packet switching
(B) Broadcast domain enlargement
(C) Packet filtering
(D) Collision prevention on a LAN segment
(E) Broadcast forwarding
(F) Internetwork communication
4 Which one of the binary number ranges shown below corresponds to the value of the first
octet in Class B address range?
C
(A) 10000000-11101111
(B) 11000000-11101111
(C) 10000000-10111111
(D) 10000000-11111111
(E) 10000000-11111110
5 If you apply a /28 subnet mask to the 211.20.10.0 network, how many sub-networks and
hosts in each sub-network are available?
C
(A) 32 networks and 18 hosts.
(B) 30 networks and 6 hosts.
(C) 16 networks and 14 hosts.
(D) 8 networks and 30 hosts.
(E) 6 networks and 32 hosts.
(F) None of the above
6 Which address below represents a unicast address?
E
(A) 232.1.1.25
(B) 192.168.0.0
(C) 192.168.24.59/30
(D) 255.255.255.255
(E) 172.31.128.255/18
7 Which of the following descriptions can alleviate the problem of excessive collisions in a
LAN? (choose two answers)
A、D
(A) reduce the size of collision domains
(B) reduce number of broadcast domains
(C) add extra hubs
(D) add extra managed switches
(E) add additional transceivers
(F) increase the length of UTP cable runs
8 What are some of the advantages of using a link-state routing protocol instead of a distance
vector routing protocol? (choose two answers)
C、D
(A) The topology database eliminates the need for a routing table.
(B) Frequent periodic updates are sent to minimize the number of incorrect routes in the
topological database.
(C) Routers have direct knowledge of all links in the network and how they are connected.
(D) After the initial LSA flooding, they generally require less bandwidth to communicate
changes in a topology.
(E) Link-state protocols require less router processor power than distance vector protocols.
9 When must a router serial interface be configured with the clock rate command?
A
(A) when the interface is functioning as a DCE device
(B) when the interface timers have been cleared
(C) when the connected DTE device is shut down
(D) when the interface is functioning as a DTE device
10 Router(config)# access-list 101 deny tcp 192.5.5.0 0.0.0.255 201.100.11.0 0.0.0.255 eq 23
Router(config)# access-list 101 permit ip any any
A network administrator is trying to deny Telnet traffic from the 192.5.5.0 network to the
201.100.11.0 network, so he enters the commands shown above. When monitoring the network,
the administrator noticed that Telnet packets were still passing between these two computers.
Why?
C
(A) The router ignored this type of traffic because it required a standard access list to be
configured instead of an extended one.
(B) The wrong port was configured for the ACL so Telnet traffic was still allowed.
(C) The access list has not been assigned to an interface.
(D) The permit ip any any allowed all traffic to pass regardless of the other statements listed in
this ACL.
11 ACL statements operate in sequential, logical order. If a condition match is true, the rest of
the ACL statements are not checked. If all of the ACL statements are unmatched, what
happens to the packet?
A
(A) The implicit deny any statement placed at the end of the list will cause the packets to be
dropped.
(B) The packets will be placed in a buffer and forwarded when the ACL is removed.
(C) The packets will be sent to the source with an error notification message.
(D) The implicit permit any statement placed at the end of the list will allow the packets to flow
through uninhibited.
12 A routing table contains static, RIP, and IGRP routes destined to the same network with
each route set to its default administrative distance. Which route will be the preferred route?
B
(A) The RIP route
(B) The static route
(C) The IGRP route
(D) All three will load balance
13 If you want to block all the hosts in the subnet 192.168.16.43/28, which IP address and
wildcard mask would you use in your ACL?
D
(A) 192.168.16.32 0.0.0.16
(B) 192.168.16.43 0.0.0.212
(C) 192.168.16.0 0.0.0.15
(D) 192.168.16.32 0.0.0.15
(E) 192.168.16.0 0.0.0.31
(F) 192.168.16.16 0.0.0.31
14 Which one of the access control list statements below will deny all telnet connections to
subnet 10.10.1.0/24?
D
(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
15 Which addresses below are available for host addresses on the subnet 192.168.9.19/28?
(choose three answers)
A、C、F
(A) 192.168.9.17
(B) 192.168.9.14
(C) 192.168.9.29
(D) 192.168.9.16
(E) 192.168.9.31
(F) 192.168.9.24
16 Which of the following are the functions of CSMA/CD? (choose three answers)
B、D、E
(A) releasing a token when the network is clear
(B) detecting errors within data packets or on the network
(C) passing a token to each station on the network
(D) decoding data packets and checking them for valid addresses before passing them to the
upper layers of the OSI model
(E) transmitting and receiving data packets
17 When the backoff algorithm is invoked after an Ethernet collision, which device has
priority to transmit data?
C
(A) the device involved in the collision with the lowest MAC address
(B) the device involved in the collision with the lowest IP address
(C) any device in the collision domain whose backoff timer expires first
(D) those that began transmitting at the same time
18 If you are required to allow establishment of Telnet session with a Cisco router, which set of
commands must be configured?
C
(A) line vty 0 ; password cisco
(B) line vty 0 ; enable secret cisco ; login
(C) line vty 0 ; password cisco ; login
(D) line console 0 ; password cisco
(E) line console 0 ; enable secret cisco
(F) line console 0 ; password cisco ; login
19 Which command will configure a default route on a router?
D
(A) ip route 0.0.0.0. 10.1.1.0 10.1.1.1
(B) ip default-route 10.1.1.0
(C) ip default-gateway 10.1.1.0
(D) ip route 0.0.0.0 0.0.0.0 10.1.1.1
20 You are given a PC, a router, and a cable. Select the correct combination that will allow you
to log into the router locally using a terminal emulation program such as HyperTerminal.
C
(A) Connect the PC's COM port to the router's console port using a straight-through cable.
(B) Connect the PC's Ethernet port to the router's Ethernet port using a rollover cable.
(C) Connect the PC's COM port to the router's console port using a rollover cable.
(D) Connect the PC's Ethernet port to the router's Ethernet port using a straight- through cable.
(E) Connect the PC's COM port to the router's Ethernet port using a straight-through cable.
21 When configuring RIP, the “network” command is used to
B
(A) Specify the network address of an interface
(B) Specify which interfaces will exchange RIP routing updates
(C) Activate RIP protocol on the interface
(D) Enable the use of VLSM
(E) Specify the subnet mask of an interface
22 When a VLAN is deleted, all ports assigned to that VLAN
A
(A) become inactive
(B) become part of VLAN1
(C) become part of VLAN0
(D) remain a part of that VLAN until the switch is rebooted
(E) VLAN cannot be deleted if there are ports associated with it
23 Which of the following are true when configuring a router interface for VLAN trunking?
(choose two answers)
B、C
(A) one physical interface for each VLAN
(B) one IP subnetwork for each subinterface
(C) a compatible trunking protocol encapsulation for each subinterface
(D) one trunked link per VLAN
(E) one physical interface for each interface
24 Router Taipei is connected to router Tainan over a serial interface running PPP. Router
Taipei configures its enable password to “cisco” and authentication password for router
Tainan to “class”. Which command must be executed on the Tainan router to allow Taipei to
authenticate to the Tainan router using CHAP?
B
(A) enable secret class
(B) username Tainan password class
(C) hostname Tainan secret password class
(D) hostname Tainan password class authentication chap
(E) username Tainan password class authentication chap
25 In Taiwan, which equipments should a customer purchase in order to connect to an ISDN
BRI WAN service?
A
(A) a router with an ISDN BRI S/T interface
(B) a router with an ISDN BRI U interface
(C) a router with an ISDN modem and a serial interface
(D) a TE1 device attached to a router serial interface
(E) a TE2 device attached to a router serial interface
26 Which of the following is the signaling protocol for ISDN call setup?
C
(A) Q.920
(B) Q.921
(C) Q.931
(D) I.430
(E) LAPD
27 Knowing the type of traffic to be carried on the WAN links can help us to
D
(A) determine the routing protocol to be used
(B) determine the WAN topology to be used
(C) determine the signaling protocol to be used on the WAN link
(D) determine the requirements for latency and jitter
(E) determine the installation procedure of the WAN link
28 If 163.168.2.81 is the first usable IP address for a subnet and 163.168.2.87 is the broadcast
address of the subnet, which of the following is true?
C
(A) it is a class C address
(B) its network address is 163.168.2.0
(C) its subnet mask is 255.255.255.248
(D) number of usable subnets is 62
(E) number of usable IP addresses of the subnet is 8
29 A border router Z is connected to three internal routers A, B, C. Subnets connected to
router A are 200.168.98.0/24, 200.168.99.0/24. Subnets connected to router B are
200.168.100.0/24, 200.168.101.0/24, 200.168.102.0/24. The subnet connected router C is
200.168.105.0/24. After route summarization, route summary sent out by router Z will be?
B
(A) 200.168.98.0/20
(B) 200.168.96.0/20
(C) 200.168.98.0/21
(D) 200.168.96.0/21
(E) 200.168.98.0/22
30 Which is true regarding frame relay?
B
(A) SVC is more common than PVC
(B) A VC is identified by DLCI
(C) DLCI usually has global significance
(D) A router connects to the Frame Relay network using only one VC to connect various end
points
(E) Capacity of an access line is based on the maximum bandwidth requirement of the VC
31 Which statements describe features of full-duplex Ethernet? (choose two answers)
C、D
(A) runs CSMA/CD protocol
(B) increases the number of broadcast domains
(C) no collisions
(D) speed matching may be required to support different speed on different port
(E) requires a minimum of two wires
32 If a company is assigned a class C address 200.168.168.0/24, and it needs 7 subnets, each
with 20 hosts. Which of the following is true?
D
(A) It is impossible to configure according to the requirement
(B) set subnet mask to 255.255.255.0
(C) set the usable IP addresses of each subnet to 32
(D) 200.168.168.0/27 is a legal subnet
(E) 200.168.168.32 is a legal IP address
33 A company has a central office and three branches; each has a router and 20 hosts. The
four routers are connected in a star topology; each branch router is connected to the router in
the central office. The company is assigned with a class C address 200.168.168.0/24. Which of
the following are true when allocating subnets? (choose two answers)
D、E
(A) length of subnet mask can be set to 26
(B) each subnet can accommodates 64 hosts
(C) each subnet can accommodates 62 hosts
(D) 200.168.168.96 is a network address of one the of subnets
(E) a subnet of 200.168.168.200/30 could be used to connect two routers
34 Which describes the features of OSPF? (choose three answers)
C、D、F
(A) efficient, requires less memory and processor power
(B) effective, requires less flooding messages
(C) no looping, a link-state protocol
(D) usually requires a loopback interface as it needs an IP as its OSPF router ID
(E) DR election is based on its router ID, lower ID is preferred
(F) fast convergence
35 Which of the following Ethernet switching mechanism has the fastest speed and can avoid
runt?
B
(A) cut through
(B) frame forward
(C) store and forward
(D) frame free
(E) CAM
36 When deploying switches for a large-sized organization, a hierarchical design model is
required. Which of the following are true? (choose two answers)
B、D
(A) It consists of three layers: access layer, distribution layer, and central layer
(B) Cisco Catalyst 2950 series can be used as an access layer devices
(C) VLAN routing should be supported at access layer
(D) Distribution layer switches are multi-layer switches
(E) Cisco Catalyst 6500 series are distribution layer switches
37 Regarding configuring a Catalyst 2950 switch, which of the following are true? (choose two
answers)
B、D
(A) port-security can set authentication password on a port
(B) port-security can limit the number of MAC addresses per port
(C) During the password recovery procedure, turn off the power and then turn the power back
on while holding down the MODE button until the START LED turns on.
(D) During the password recovery procedure, at the DOS prompt, we should rename
flash:config.text to another name and reboot the switch.
(E) During the password recovery procedure, after the switch is rebooted, we should not copy
flash:config.text system:running-config otherwise we cannot get into the enable mode
38 Which describes the Spanning Tree Protocol? (choose two answers)
A、E
(A) Steps of building spanning tree are (in order): decide root, decide RP of each switch,
decide DP of each LAN
(B) Root bridge is the switch with the highest speed
(C) Routing path between two switches is the shortest path
(D) When a port is in blocking state and does not receive BPDU for max_age (20 seconds), it
will enter listening state and start to learn MAC addresses.
(E) IEEE 802.1w defines a new rapid spanning tree protocol
39 Which is not true about VLAN?
D
(A) A VLAN is a broadcast domain created by one or more switches.
(B) A VLAN corresponds to an IP subnet
(C) A physical interface of a router can support multiple VLANs
(D) Packets can be switched between VLANs according to frame tagging without going
through a router
(E) Cisco Discovery Protocol (CDP) are sent on VLAN 1
40 Which is not true when troubleshooting of a VLAN?
E
(A) use show interfaces command on the switch to check alignment or frame-check-sequence
(FCS) errors
(B) use show interface status command on the switch to verify that the duplex and speed are
set properly between the switch and the router
(C) use show interfaces command on the router to verify that the duplex and speed are set
properly between the switch and the router
(D) use show interfaces command on the router to verify that the physical router interface is
configured with one subinterface for each VLAN
(E) use show interfaces command on the router to confirm that the router is running an IOS
release that supports trunking