CCNA
1.Which
of the following types of packets will
be allowed entry when a serial interface's
inbound access list has been configured
to prohibit entry for TCP and UDP ports
21, 23 and 25? (Select three options.)
A. SMTP
B. STP
C. FTP
D. Telnet
E. HTTP
F. POP3
答案及讲解收听序号:
16861000－7－01
top
2.One
of the trainees assigned to you want
to know which services use TCP. What
can you tell him? (Select three options.)
A. DHCP
B. SMTP
C. SNMP
D. FTP
E. HTTP
F. TFTP
答案及讲解收听序号:
16861000－7－02
top
3.Which
of the following network masks would
you use to reduce any wastage of IP
addresses in point-to- point WAN links
on a network that supports VLSM?
A.
/38
B. /30
C. /27
D. /23
E. /18
答案及讲解收听序号:
16861000－7－03
top
4.How
would you configure a router to avoid
situations such as split horizon issues
hampering routing updates on a Frame
Relay network?
A. Configure a separate
sub-interface for each PVC with a unique
DLCI and subnet assigned to the subinterface.
B. Configure each Frame Relay circuit
as a point-to-point line to support
multicast and broadcast traffic.
C. Configure one sub-interface to disperse
into multiple PVC connections to multiple
remote router interfaces.
D. Configure as many as possible sub-interfaces
on the same subnet.
答案及讲解收听序号:
16861000－7－04
top
5.With
regard to ISDN, which of the following
are true? (Choose all that apply.)
A.
Legacy DDR can use port information
to define interesting traffic.
B. Legacy DDR can configure multiple
dialer configurations on the same interface.
C. Legacy DDR can use ACLs to define
interesting traffic.
D. HDLC or PPP can be used to encapsulate
ISDN D channel information.
E. The BRI interfaces on ISDN routers
with dialer profiles configured cannot
belong to multiple dialer pools.
F. Dialer profiles cannot use ACLs to
define interesting traffic.
答案及讲解收听序号:
16861000－7－05
top
CCNP
- BSCI
6.Which
of the following is a characteristic
of link-state protocols?
A.
A network topology change generates
an update that is broadcast to every
router on
the network.
B. The periodic routing update interval
is slightly different in each router
on a subnet.
C. Each router creates a routing table
that only includes its directly connected
neighbors.
D. Link-state protocols send routing
updates only when there is a change
in the network
topology.
答案及讲解收听序号:
16861000－7－06
top
7.What
is the term associated with synchronizing
the routing tables after a topology
change occurs?
A. flooding
B. broadcasting
C. convergence
D. summarization
答案及讲解收听序号:
16861000－7－07
top
8.Which
of the following must be determined
first by the router in order to route
the data?
A.
the distance metric of the data
B. the source address of the data
C. which routing protocol is used by
the data
D. whether the protocol suite of the
data is active
答案及讲解收听序号:
16861000－7－08
top
9.You
are a technician at ABC. ABC has the
subnet/mask of 172.29.100.0/26 set aside
for small remote locations. Each location
will have 5 IP devices connected to
the network. Which VLSM mask will provide
the minimum number of hosts you require?
A. /27
B. /28
C. /29
D. /30
E. /31
答案及讲解收听序号:
16861000－7－09
top
10.You
are a trainee technician at ABC. Your
instructor shows you the following route
summarization entry:
192.168.134.0/22 Your instructor wants
to know how many class C addresses are
contained in this summarization. What
would your reply be?
A.
1
B. 2
C. 4
D. 8
E. 16
答案及讲解收听序号:
16861000－7－10
top
-
BCMSN
11.Which
command enables an EtherChannel bundle
on a Catalyst 2900XL switch?
A. Port group
B. Set port channel on
C. Port etherchannel enable
D. Set etherchannel port enable
答案及讲解收听序号:
16861000－7－11
top
12.Which
two statements about dynamic VLANs are
true? (Choose two)
A. Each switch port
is assigned to a specific VLAN.
B. Dynamic VLANs require a VLAN Membership
Policy Server.
C. Devices are in the same VLAN regardless
of which port they attach to.
D. Dynamic VLAN assignment are made
through the command interface.
答案及讲解收听序号:
16861000－7－12
top
13.Which
statement is correct about 802.1Q trunking?
(Select all that apply)
A. Both switches must
be in the same VTP domain.
B. The encapsulation type of both ends
of the trunk does not have to match.
C. The native VLAN on both ends of the
trunk must be VLAN 1.
D. 802.1Q trunking can only be configured
on a Layer 2 port.
E. In 802.1Q trunking, all VLAN packets
are tagged on the trunk link, except
the native VLAN.
答案及讲解收听序号:
16861000－7－13
top
14.You
need to take advantage of FastEthernet
ports. Which two actions avoid configuration
problems that cause the port to be automatically
disabled? (Choose two)
A.
Allow some ports in a channel to be
disabled.
B. Configure the ports in a channel
as dynamic VLAN ports.
C. Configure all ports in a channel
to operate at the same speed and duplex
mode.
D. Assign all ports in a channel to
the same VLAN or configure them as trunk
ports.
答案及讲解收听序号:
16861000－7－14
top
15.What
is the cause of jitter?
A. Variable queue delays
B. Packet drops
C. Transmitting too many small packets
D. Compression
答案及讲解收听序号:
16861000－7－15
top
- BCRAN
16.Regarding
DHCP, DHCP relay and DHCP server are
mutually exclusive.
A. None of the choices.
B. True
C. False only for certain IOS version
D. False
E. False only for IOS version below
V10
答案及讲解收听序号:
16861000－7－16
top
17.A
LAPD Address field can be 1 or 2 bytes
long.
A. True
B. False
C. True only in the US
D. True only in Asia
E. True only in Europe
答案及讲解收听序号:
16861000－7－17
top
18.Which
of the following are valid functions
of the lock DTE modem attribute (Choose
all that apply)?
A. Disable UART.
B. Enable UART.
C. Locks the data speed between the
computer motherboard and the RS232 port.
D. Locks the data speed between the
modem and the DTE device.
答案及讲解收听序号:
16861000－7－18
top
19.Which
of the following are not the valid types
of ATM addresses (Choose all that apply)?
A. DCC
B. GCT
C. BSP
D. ICD
E. NSAP
F. AED
答案及讲解收听序号:
16861000－7－19
top
20.Which
of the following are NOT the valid types
of X.25 PLP packet fields (Choose all
that apply)?
A.
User Data
B. LCI
C. GFI
D. PTI
E. None of the choices.
答案及讲解收听序号:
16861000－7－20
top
- CIT
21.You
are a technician at ABC.com. Your newly
appointed ABC trainee wants to know
what the similarities between Topology
Diagrams and Network Configuration Tables
are.
What would your reply be? (Choose all
that apply.)
A.
Both share few components.
B. Both share many of the same components.
C. Both define physical memory components.
D. Both are used for troubleshooting.
E. Both use lines and symbols to represent
network components.
答案及讲解收听序号:
16861000－7－21
top
22.You
are a technician at ABC.com. Your newly
appointed ABC trainee wants to know
what the default action for the output
of debug and system error messages is.
What would your reply be?
A.
Output goes to the remote console if
logging is off.
B. Output is sent to the console terminal.
C. Error logging automatically invokes
debug output to the designated TFTP
server.
D. Output configuration requires a TFTP
server to write files
E. Output is written to a Syslog server.
答案及讲解收听序号:
16861000－7－22
top
23.You
are the network administrator at ABC.com.
ABC has a switched network. You want
to control the designation of the spanning-tree
root bridge in the ABC network. What
should you do?
A.
By enabling uplink-fast on the ports
of the desired switch.
B. By lowering the bridge priority on
the desired switch.
C. By setting a lower MAC address on
the designated switch.
D. By raising the bridge ID on one switch.
答案及讲解收听序号:
16861000－7－23
top
24.You
are a technician at ABC. You receive
a report from several ABC users who
complain that they get slow responses
when sending and receiving email, especially
when browsing the Internet. You investigate
the complaint by checking the output
of a ping command issued from her computer
and find that it indicates intermitted
success and failures messages, when
attempting to contact the email server.
A tracert to the corporate Internet
gateway router shows high latency and
occasional time out messages.
What would be the most effective troubleshooting
approach if you are to determine the
cause of the slow response time?
A.
Bottom-up approach
B. Random access approach
C. Divide and conquer approach
D. Top-down approach
E. Top-down rule-out approach
答案及讲解收听序号:
16861000－7－24
top
25.You
are a technician at ABC.com. Your newly
appointed ABC trainee wants to know
what features make OSPF more suitable
than RP in large network installations.
What would your reply be? (Choose all
that apply.)
A.
Diffusing Update Algorithm
B. No hop count limitation
C. Higher routing update overhead
D. Faster convergence
E. Lower routing update overhead
答案及讲解收听序号:
16861000－7－25
top
CCIE
26.You
are the network administrator at ABC.
You are troubleshooting a network problem.
You want to trace the route to a Unix
workstation that you want to reach through
the Internet. However, Traceroute does
not work.
Currently, there is an inbound access-list
applied to the serial interface on Router
1. An entry in the access-list states
"access-list 101 permit tcp any
any". What access-list entry may
you need to be added to the access-list
in order to get traceroute to work?
A. access-list 101 permit
udp any any
B. access-list 101 permit icmp any any
time-exceeded access-list 101 permit
icmp any any port-unreachable
C. access-list 101 permit icmp any any
time-exceeded access-list 101 permit
icmp any any net-unreachable
D. access-list 101 permit icmp any any
echo access-list 101 permit icmp any
any net-unreachable
E. access-list 101 permit udp any any
access-list 101 permit icmp any any
protocol-unreachable
答案及讲解收听序号:
16861000－7－26
top
27.What
does the BGP backdoor command do?
A. It changes the distance
of an iBGP route to 20.
B. It changes the distance of an eBGP
route to 200.
C. It changes the distance of an IGP
route to 20.
D. It does not effect any changes in
distance of the route.
E. It changes the distance of an IGRP
route to 200.
答案及讲解收听序号:
16861000－7－27
top
28.Which
of the following DNS resource records
is not valid?
A. NS
B. PTR
C. MX
D. FQDN
E. A
答案及讲解收听序号:
16861000－7－28
top
29.Which
of the following features is provided
by RIP v2 that were previously not possible
with RIP v1? (Choose all that apply.)
A.
Classless routing and split-horizon.
B. Poison reverse and updating to multicast
addresses.
C. Poison reverse and classless routing.
D. Classless routing and updating to
multicast addresses.
E. Route tag and classless routing.
答案及讲解收听序号:
16861000－7－29
top
30.Which
of the following statements is valid
when taking Custom Queuing into account?
A. Custom queuing has
the ability to restrict a particular
type of traffic to a given bandwidth
not matter what is load is like on that
link.
B. Custom queuing looks at groups of
packets from the similar source-destination
pairs.
C. Custom queuing will not proceed to
a next queue unless the current queue
is empty.
D. Custom queuing can prevent one type
of traffic from dominating a busy link.
答案及讲解收听序号:
16861000－7－30
top
|
