求cisco在线考试的题库，要带答案
作者&投稿：宰父婉 （若有异议请与网页底部的电邮联系）
上学吧在线考试考研题库很不错，里面有大量的考研免费试卷，可以在线考试和下载，
我没有答案，但是目测你好像是题目答案没选好，第一张图看出来，多选题，你只选了一个答案，第一张图你试一下选前三个选项，第二张图的四个全选
CISCO 在线模拟考试试题CCNA
1.If you take a dotted-decimal class A IP address such as 10.0.0.1 and convert the first octet to binary.
Which of the following is the correct bit pattern for the first octet?
A. 0xxxxxxx
B. 10xxxxxx
C. 110xxxxx
D. 1110xxxx
E. 11110xxx
答案及讲解收听序号: 16861000－7－01 top
answer:A
2.Which of the following statements about a reliable connection oriented data transfer are true? (Choose
two)
A. Recipients acknowledge receipt of data.
B. When buffers are filled to capacity, datagrams are discarded and not re transmitted.
C. Windows are used to control the amount in outstanding acknowledged data segments.
D. If the segments timer expires between receipt of an acknowledgement the sender drops the connection.
E. The receiving device waits for acknowledgements from the sending device before accepting more data
segments.
答案及讲解收听序号: 16861000－7－02 top
answer:A C
3.Which two statements are valid? (Choose two.)
A. Full-duplex Ethernet consists of a shared broadcast domain, while half-duplex Ethernet consists of a
private broadcast domain.
B. Full-duplex Ethernet is collision free, while half-duplex Ethernet is subject to collisions.
C. Full-duplex Ethernet provides higher throughput than half-duplex Ethernet of the same bandwidth.
D. Full-duplex Ethernet provides lower throughput than half-duplex Ethernet of the same bandwidth.
E. Full-duplex Ethernet consists of a shared cable segment while half-duplex Ethernet provides a point-topoint
link.
答案及讲解收听序号: 16861000－7－03 top
answer:B C
4.What is the network address for a host with the IP address 123.200.8.68/28?
A. 123.200.8.0
B. 1231.200.8.32
C. 123.200.8.64
D. 123.200.8.65
E. 123.200.8.31
F. 123.200.8.1
答案及讲解收听序号: 16861000－7－04 top
answer:C
5.How does a layer two device such as a bridge or switch function?
A. It maintains a table of the IP address of the host connected to its internet segment
B. It passes packets outside of its network segment if its IP address cannot be found on its table.
C. It looks up the frames destination in its address table and sends the frame towards the destination.
D. It maintains the table of the data link layer and network layer addresses for the host connected to its
network segment.
答案及讲解收听序号: 16861000－7－05 top
answer:C
6.Which of the following are reasons to use VLANs? (Choose three.)
A. They increase the size of collision domains.
B. They allow logical grouping of users by function.
C. They enhance network security.
D. They increase the size of broadcast domains while decreasing the number of broadcast domains.
E. They increase the number of broadcasts domain while decreasing their size.
F. The simplify switch administration
答案及讲解收听序号: 16861000－7－01 top
answer:B C E
7.You need to segment your network which of the following hardware devices can you use to segment your
network? (Choose three.)
A. Hub
B. Repeater
C. Switch
D. Bridge
E. Router
F. Media converte
答案及讲解收听序号: 16861000－7－02 top
answer:C D E
8.Your company is concerned about Security on your network. Each department has its own file server
and the company also has an enterprise server that is shared by all departments. The accounting
department is concerned about the accounting information being accessible from the other departments.
What can you as the network administrator use to control the information so that it’s not being passed
between the departments?
A. Bridge between management and sites.
B. Routers to provide the most secure segmentation.
C. A hub to provide the ease of management and a satisfactory alternative for the network security.
D. An Ethernet switch to secure separation through programming the access list of each port of the switch.
答案及讲解收听序号: 16861000－7－03 top
answer:B
9.What are the advantages of using the OSI layered network model? (Choose three.)
A. Allows multiple-vendor development through standardization of network components.
B. Creates a list of
不用发给你了，你上这个博客就有http://blog.chinaunix.net/u2/79877/showart_1871625.html，很全。除了折扣考试的。
Which of the following are requirements of LAN design? (Choose three.)
adaptability
manageability
operability
scalability
stability
When designing a LAN, at which layer of the OSI model does the process of segmenting collision domains occur?
Layer 1
Layer 2
Layer 4
Layer 7
Which of the following affect network availability? (Choose three.)
throughput
response time
workstation speed
access to resources
desktop applications
What type of cabling is specified by TIA/EIA standards for interconnection of Intermediate and Main Distribution Facilities?
patch cables of variable lengths
horizontal cross-connect cabling
vertical cross-connect cabling
parallel cross-connect cabling
Which of the following are features of the access layer of the hierarchical network design model? (Choose two.)
inter-VLAN routing
Layer 2 filtering
Layer 3 filtering
microsegmentation
bandwidth security
A distribution layer switch operates at which OSI layers? (Choose two.)
access
data link
network
internet
transport
Which layer of the hierarchical network design model is often referred to as the backbone?
access
distribution
network
core
workgroup
WAN
At which layer of the hierarchical design model do users connect to the network?
application
access
distribution
network
core
Which of the following are characteristics of the core layer of the hierarchical network design model? (Choose three.)
redundant paths
high-level policy enforcement
packet manipulation
media transitions
rapid forwarding of traffic
no packet filtering
What is the primary reason for implementing security and policy routing at the distribution layer?
filtering of core switching errors
preventing policy and security issues from burdening the core layer
preventing unnecessary security policy decisions from burdening the access layer
maintaining a consistent three-layer security policy
isolating the access layer from traffic destined for other networks
A major network upgrade that was designed to improve speed and reliability has recently been completed. Users in one part of the network are experiencing dramatically decreased throughput and loss of connectivity. Which of the LAN design goals was not met for these users?
functionality
sustainability
adaptability
manageability
scalability
To reduce cost on a new network design, administrators select switches that initially will have 100 Mbps interface modules installed but will also have the ability to support 1000 Mbps interface modules. Which of the LAN design goals are being utilized? (Choose two.)
sustainability
reliability
manageability
adaptability
functionality
scalability
What will increase the number of broadcast domains in a network? (Choose two.)
replacing hubs with switches
segmenting the network by installing a router
creating VLANs for each workgroup
adding additional hubs to the local area network
replacing routers with LAN switches
adding bridges to connect different workgroups
Where should DNS and email servers be located?
IDF
MDF
HCC
VCC
POP
Which LAN standard uses CSMA/CD as its access method?
FDDI
Ethernet
Wireless
Token Ring
VLAN1 and VLAN2 have been configured on a switch. What must be done for hosts on VLAN1 to communicate with hosts on VLAN2?
VLAN overlapping must be enabled on the switch.
The MAC address must be added to the ARP table in the switch.
A router must be configured to allow routing between the VLANs.
An entry in the switching table must be configured for each VLAN.
Communication between VLANs is automatically enabled on switches
A network administrator needs to increase bandwidth and reduce traffic on a network. What should be used in the access layer of the hierarchical network design model to dedicate bandwidth to users while limiting broadcast domains?
one router with multiple fast Ethernet interfaces
multiple routers with Fast Ethernet interfaces
multi-port gigabit switches
switches running VLANs
managed smart hubs
Which devices are considered acceptable for creating more connection points at the end of horizontal cable runs? (Choose two.)
hubs
bridges
switches
routers
Why is it important that the data carrying capacity of vertical cabling be greater than that of the horizontal cable?
Vertical cabling is reserved for high bandwith video conferencing.
Vertical cabling carries traffic from the IDF to the user.
Vertical cabling carries traffic from the enterprise out to the Internet.
Vertical cabling carries traffic from multiple areas of the network.
Layer-three packets move faster through vertical cabling.
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