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WorksheetsFinal Exam Answers Full - ENSA (71-140)
Total questions: 71
Worksheet time: 2hrs 22mins
71. What are two benefits of extending access layer connectivity to users through a wireless medium? (Choose two.)
reduced costs
decreased number of critical points of failure
increased flexibility
increased bandwidth availability
increased network management options
72. What are two purposes of launching a reconnaissance attack on a network? (Choose two.)
to scan for accessibility
to retrieve and modify data
to gather information about the network and devices
to prevent other users from accessing the system
to escalate access privileges
73. A group of users on the same network are all complaining about their computers running slowly. After investigating, the technician determines that these computers are part of a zombie network. Which type of malware is used to control these computers?
botnet
spyware
virus
rootkit
74. An ACL is applied inbound on a router interface. The ACL consists of a single entry:
access-list 101 permit tcp 10.1.1.0 0.0.0.255 host 192.31.7.45 eq dns .
If a packet with a source address of 10.1.1.201, a destination address of 192.31.7.45, and a protocol of 23 is received on the interface, is the packet permitted or denied?
permitted
denied
75. Refer to the exhibit. From which location did this router load the IOS?
flash memory
NVRAM?
RAM
ROM
a TFTP server?
76. Refer to the exhibit. Which data format is used to represent the data for network automation applications?
XML
YAML
HTML
JSON
77. What QoS step must occur before packets can be marked?
classifying
shaping
queuing
policing
78. What is the main function of a hypervisor?
It is used to create and manage multiple VM instances on a host machine.
It is a device that filters and checks security credentials.
It is a device that synchronizes a group of sensors.
It is software used to coordinate and prepare data for analysis.
79. A company needs to interconnect several branch offices across a metropolitan area. The network engineer is seeking a solution that provides high-speed converged traffic, including voice, video, and data on the same network infrastructure. The company also wants easy integration to their existing LAN infrastructure in their office locations. Which technology should be recommended?
Frame Relay
Ethernet WAN
VSAT
ISDN
80. Refer to the exhibit. As traffic is forwarded out an egress interface with QoS treatment, which congestion avoidance technique is used?
traffic shaping
weighted random early detection
classification and marking
traffic policing
81. An ACL is applied inbound on a router interface. The ACL consists of a single entry:
access-list 101 permit tcp 10.1.1.0 0.0.0.255 host 10.1.3.8 eq dns .
If a packet with a source address of 10.1.3.8, a destination address of 10.10.3.8, and a protocol of 53 is received on the interface, is the packet permitted or denied?
denied
permitted
82. Refer to the exhibit. What is the purpose of the command marked with an arrow shown in the partial configuration output of a Cisco broadband router?
defines which addresses are allowed into the router
defines which addresses can be translated
defines which addresses are assigned to a NAT pool
defines which addresses are allowed out of the router
83. If a router has two interfaces and is routing both IPv4 and IPv6 traffic, how many ACLs could be created and applied to it?
12
4
8
16
6
84. Refer to the exhibit. An administrator first configured an extended ACL as shown by the output of the show access-lists command. The administrator then edited this access-list by issuing the commands below.
Router(config)# ip access-list extended 101 Router(config-ext-nacl)# no 20 Router(config-ext-nacl)# 5 permit tcp any any eq 22 Router(config-ext-nacl)# 20 deny udp any any
Which two conclusions can be drawn from this new configuration? (Choose two.)
TFTP packets will be permitted.
Ping packets will be permitted.
Telnet packets will be permitted.
SSH packets will be permitted.
All TCP and UDP packets will be denied.
85. Which troubleshooting approach is more appropriate for a seasoned network administrator rather than a less-experienced network administrator?
a less-structured approach based on an educated guess
an approach comparing working and nonworking components to spot significant differences
a structured approach starting with the physical layer and moving up through the layers of the OSI model until the cause of the problem is identified
an approach that starts with the end-user applications and moves down through the layers of the OSI model until the cause of the problem has been identified
86. Refer to the exhibit. Many employees are wasting company time accessing social media on their work computers. The company wants to stop this access. What is the best ACL type and placement to use in this situation?
extended ACL outbound on R2 WAN interface towards the internet
standard ACL outbound on R2 WAN interface towards the internet
standard ACL outbound on R2 S0/0/0
extended ACLs inbound on R1 G0/0 and G0/1
87. Refer to the exhibit. An administrator is trying to configure PAT on R1, but PC-A is unable to access the Internet. The administrator tries to ping a server on the Internet from PC-A and collects the debugs that are shown in the exhibit. Based on this output, what is most likely the cause of the problem?
The inside and outside NAT interlaces have been configured backwards
The inside global address is not on the same subnet as the ISP
The address on Fa0/0 should be 64.100.0.1.
The NAT source access list matches the wrong address range.
88. Why is QoS an important issue in a converged network that combines voice, video, and data communications?
Data communications must be given the first priority.
Voice and video communications are more sensitive to latency.
Legacy equipment is unable to transmit voice and video without QoS.
Data communications are sensitive to jitter.
89. Which statement describes a VPN?
VPNs use logical connections to create public networks through the Internet.
VPNs use open source virtualization software to create the tunnel through the Internet.
VPNs use dedicated physical connections to transfer data between remote users.
VPNs use virtual connections to create a private network through a public network.
90. In which OSPF state is the DR/BDR election conducted?
ExStart
Init
Two-Way
Exchange
91. Two corporations have just completed a merger. The network engineer has been asked to connect the two corporate networks without the expense of leased lines. Which solution would be the most cost effective method of providing a proper and secure connection between the two corporate networks?
Cisco Secure Mobility Clientless SSL VPN
Frame Relay
remote access VPN using IPsec
Cisco AnyConnect Secure Mobility Client with SSL
site-to-site VPN
92. What is the final operational state that will form between an OSPF DR and a DROTHER once the routers reach convergence?
loading
established
full
two-way
93. Refer to the exhibit. If the switch reboots and all routers have to re-establish OSPF adjacencies, which routers will become the new DR and BDR?
Router R3 will become the DR and router R1 will become the BDR.
Router R4 will become the DR and router R3 will become the BDR.
Router R1 will become the DR and router R2 will become the BDR.
Router R3 will become the DR and router R2 will become the BDR.
Case 2:
93. Refer to the exhibit. If the switch reboots and all routers have to re-establish OSPF adjacencies, which routers will become the new DR and BDR?
Router R2 will become the DR and router R4 will become the BDR.
Router R1 will become the DR and router R3 will become the BDR.
Router R4 will become the DR and router R3 will become the BDR.
Router R3 will become the DR and router R2 will become the BDR.
94. Which type of server would be used to keep a historical record of messages from monitored network devices?
DNS
DHCP
syslog
authentication
95. When QoS is implemented in a converged network, which two factors can be controlled to improve network performance for real-time traffic? (Choose two.)
packet addressing
delay
jitter
packet routing
link speed
96. In which step of gathering symptoms does the network engineer determine if the problem is at the core, distribution, or access layer of the network?
Determine ownership.
Determine the symptoms.
Narrow the scope.
Document the symptoms.
Gather information.
97. What protocol sends periodic advertisements between connected Cisco devices in order to learn device name, IOS version, and the number and type of interfaces?
CDP
SNMP
NTP
LLDP
98. An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 192.168.0.0 255.255.252.0. What wildcard mask would the administrator use in the OSPF network statement?
0.0.0.127
0.0.0.31
0.0.3.255
0.0.0.63
99. Refer to the exhibit. An administrator configures the following ACL in order to prevent devices on the 192.168.1.0 subnet from accessing the server at 10.1.1.5:
access-list 100 deny ip 192.168.1.0 0.0.0.255 host 10.1.1.5 access-list 100 permit ip any any
Where should the administrator place this ACL for the most efficient use of network resources?
inbound on router A Fa0/0
outbound on router B Fa0/0
outbound on router A Fa0/1
inbound on router B Fa0/1
100. Which type of OSPFv2 packet is used to forward OSPF link change information?
link-state acknowledgment
link-state update
hello
database description
101. What protocol synchronizes with a private master clock or with a publicly available server on the internet?
MLPS
CBWFQ
TFTP
NTP
102. Which type of VPN allows multicast and broadcast traffic over a secure site-to-site VPN?
dynamic multipoint VPN
SSL VPN
IPsec virtual tunnel interface
GRE over IPsec
103. An OSPF router has three directly connected networks; 10.0.0.0/16, 10.1.0.0/16, and 10.2.0.0/16. Which OSPF network command would advertise only the 10.1.0.0 network to neighbors?
router(config-router)# network 10.1.0.0 0.0.255.255 area 0
router(config-router)# network 10.1.0.0 0.0.15.255 area 0
router(config-router)# network 10.1.0.0 255.255.255.0 area 0
router(config-router)# network 10.1.0.0 0.0.0.0 area 0
104. Refer to the exhibit. Which sequence of commands should be used to configure router A for OSPF?
router ospf 1
network 192.168.10.0 area 0
router ospf 1
network 192.168.10.0
router ospf 1
network 192.168.10.64 255.255.255.192
network 192.168.10.192 255.255.255.252
router ospf 1
network 192.168.10.64 0.0.0.63 area 0
network 192.168.10.192 0.0.0.3 area 0
105. An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 192.168.0.0 255.255.254.0. What wildcard mask would the administrator use in the OSPF network statement?
0.0.7.255
0.0.1.255
0.0.3.255
0.0.15.255
106. How does virtualization help with disaster recovery within a data center?
improvement of business practices
supply of consistent air flow
support of live migration
guarantee of power
Case 2:
106. How does virtualization help with disaster recovery within a data center?
Less energy is consumed.
Server provisioning is faster.
Hardware at the recovery site does not have to be identical to production equipment.
Power is always provided.
107. How does virtualization help with disaster recovery within a data center?
Power is always provided
Hardware does not have to be identical.
(Other case) Hardware at the recovery site does not have to be identical to production equipment.
Less energy is consumed.
Server provisioning is faster.
108. Refer to the exhibit. Which devices exist in the failure domain when switch S3 loses power?
S4 and PC_2
PC_3 and AP_2
AP_2 and AP_1
PC_3 and PC_2
S1 and S4
109. Which set of access control entries would allow all users on the 192.168.10.0/24 network to access a web server that is located at 172.17.80.1, but would not allow them to use Telnet?
access-list 103 deny tcp host 192.168.10.0 any eq 23
access-list 103 permit tcp host 192.168.10.1 eq 80
access-list 103 permit tcp 192.168.10.0 0.0.0.255 host 172.17.80.1 eq 80
access-list 103 deny tcp 192.168.10.0 0.0.0.255 any eq 23
access-list 103 permit tcp 192.168.10.0 0.0.0.255 any eq 80
access-list 103 deny tcp 192.168.10.0 0.0.0.255 any eq 23
access-list 103 permit 192.168.10.0 0.0.0.255 host 172.17.80.1
access-list 103 deny tcp 192.168.10.0 0.0.0.255 any eq telnet
110. Refer to the exhibit. A network administrator needs to add an ACE to the TRAFFIC-CONTROL ACL that will deny IP traffic from the subnet 172.23.16.0/20. Which ACE will meet this requirement?
5 deny 172.23.16.0 0.0.15.255
5 deny 172.23.16.0 0.0.255.255
15 deny 172.23.16.0 0.0.15.255
30 deny 172.23.16.0 0.0.15.255
111. Which step in the link-state routing process is described by a router building a link-state database based on received LSAs?
executing the SPF algorithm
building the topology table
selecting the router ID
declaring a neighbor to be inaccessible
112. What protocol uses agents, that reside on managed devices, to collect and store information about the device and its operation?
SYSLOG
TFTP
CBWFQ
SNMP
113. An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 10.27.27.0 255.255.255.0. What wildcard mask would the administrator use in the OSPF network statement?
0.0.0.63
0.0.0.255
0.0.0.31
0.0.0.15
114. When will an OSPF-enabled router transition from the Down state to the Init state?
when an OSPF-enabled interface becomes active
as soon as the router starts
when the router receives a hello packet from a neighbor router
as soon as the DR/BDR election process is complete
115. What type of traffic is described as having a high volume of data per packet?
data
video
voice
116. What protocol is a vendor-neutral Layer 2 protocol that advertises the identity and capabilities of the host device to other connected network devices?
LLDP
NTP
TFTP
SNMP
117. Which step in the link-state routing process is described by a router running an algorithm to determine the best path to each destination?
building the topology table
selecting the router ID
declaring a neighbor to be inaccessible
executing the SPF algorithm
118. Refer to the exhibit. Which conclusion can be drawn from this OSPF multiaccess network?
If the DR stops producing Hello packets, a BDR will be elected, and then it promotes itself to assume the role of DR.
With an election of the DR, the number of adjacencies is reduced from 6 to 3.
When a DR is elected all other non-DR routers become DROTHER.
All DROTHER routers will send LSAs to the DR and BDR to multicast 224.0.0.5.
119. Refer to the exhibit. The network administrator has an IP address of 192.168.11.10 and needs access to manage R1. What is the best ACL type and placement to use in this situation?
extended ACL outbound on R2 WAN interface towards the internet
standard ACL inbound on R1 vty lines
extended ACLs inbound on R1 G0/0 and G0/1
extended ACL outbound on R2 S0/0/1
120. Which type of VPN connects using the Transport Layer Security (TLS) feature?
SSL VPN
IPsec virtual tunnel interface
GRE over IPsec
dynamic multipoint VPN
121. Which group of APIs are used by an SDN controller to communicate with various applications?
eastbound APIs
westbound APIs
northbound APIs
southbound APIs
122. A company has consolidated a number of servers and it is looking for a program or firmware to create and control virtual machines which have access to all the hardware of the consolidated servers. What service or technology would support this requirement?
Cisco ACI
software defined networking
Type-1 hypervisor
APIC-EM
123. What command would be used as part of configuring NAT or PAT to identify inside local addresses that are to be translated?
ip nat inside source list 24 interface serial 0/1/0 overload
ip nat inside source list 14 pool POOL-STAT overload
access-list 10 permit 172.19.89.0 0.0.0.255
ip nat inside source list ACCTNG pool POOL-STAT
124. Anycompany has decided to reduce its environmental footprint by reducing energy costs, moving to a smaller facility, and promoting telecommuting, what service or technology would support requirement?
Cloud services
Data center
APIC-EM
Cisco ACI
125. Refer to the exhibit. An administrator is trying to back up the current running configuration of the router to a USB drive, and enters the command copy usbflash0:/R1-config running-config on the router command line. After removing the USB drive and connecting it to a PC, the administrator discovers that the running configuration was not properly backed up to the R1-config file. What is the problem?
The file already exists on the USB drive and cannot be overwritten
The drive was not properly formatted with the FAT16 file system.
There is no space left on the USB drive.
The USB drive is not recognized by the router.
The command that the administrator used was incorrect.
126. Which three types of VPNs are examples of enterprise-managed site-to-site VPNs? (Choose three.)
Layer 3 MPLS VPN
IPsec VPN
Cisco Dynamic Multipoint VPN
GRE over IPsec VPN
clientless SSL VPN
127. Refer to the exhibit. Employees on 192.168.11.0/24 work on critically sensitive information and are not allowed access off their network. What is the best ACL type and placement to use in this situation?
standard ACL inbound on R1 vty lines
extended ACL inbound on R1 G0/0
standard ACL inbound on R1 G0/1
extended ACL inbound on R3 S0/0/1
128. In an OSPF network which two statements describe the link-state database (LSDB)? (Choose two.)
It can be viewed by using the show ip ospf database command.
A neighbor table is created based on the LSDB.
It contains a list of only the best routes to a particular network.
It contains a list of all neighbor routers to which a router has established bidirectional communication.
All routers within an area have an identical link-state database.
129. In an OSPF network which OSPF structure is used to create the neighbor table on a router?
adjacency database
link-state database
routing table
forwarding database
130. What protocol is used in a system that consists of three elements--a manager, agents, and an information database?
MPLS
SYSLOG
SNMP
TFTP
131. What type of traffic is described as not resilient to loss?
data
video
voice
132. Refer to the exhibit. Router R1 is configured with static NAT. Addressing on the router and the web server are correctly configured, but there is no connectivity between the web server and users on the Internet. What is a possible reason for this lack of connectivity?
Interface Fa0/0 should be configured with the command ip nat outside .
The inside global address is incorrect.
The router NAT configuration has an incorrect inside local address.
The NAT configuration on interface S0/0/1 is incorrect.
133. Which type of API would be used to allow authorized salespeople of an organization access to internal sales data from their mobile devices?
open
partner
public
private
134. Refer to the exhibit. Which data format is used to represent the data for network automation applications?
XML
HTML
YAML
JSON
135. An ACL is applied inbound on a router interface. The ACL consists of a single entry:
access-list 101 permit udp 192.168.100.32 0.0.0.7 host 198.133.219.76 eq telnet .
If a packet with a source address of 198.133.219.100, a destination address of 198.133.219.170, and a protocol of 23 is received on the interface, is the packet permitted or denied?
denied
permitted
136. Refer to the exhibit. If no router ID was manually configured, what would router R1 use as its OSPF router ID?
10.0.0.1
10.1.0.1
192.168.1.100
209.165.201.1
137. What protocol is a vendor-neutral Layer 2 protocol that advertises the identity and capabilities of the host device to other connected network devices?
NTP
LLDP
SNMP
MPLS
138. Which type of VPN uses a hub-and-spoke configuration to establish a full mesh topology?
MPLS VPN
GRE over IPsec
IPsec virtual tunnel interface
dynamic multipoint VPN
139. What is a characteristic of the REST API?
evolved into what became SOAP
used for exchanging XML structured information over HTTP or SMTP
considered slow, complex, and rigid
most widely used API for web services
