WorksheetsFinal 420-908-LA
Total questions: 39
Worksheet time: 1hrs 18mins
Which OPSF packet contains the different types of link-state advertisements?
DBD
LSR
LSAck
Hello
LSU
What does an OSPF area contain?
Routers that have the same link-state information in there LSDBs
Routers that share the same process ID
Routers that share the same router ID
Routers whose SPF trees are identical
What is the order of packet types used by an OSPF router to establish convergence?
LSAck, Hello, DBD, LSU, LSR
LSU, LSAck, Hello, DBD, LSR
Hello, LSAck, LSU, LSR, DBD
Hello, DBD, LSR, LSU, LSAck
What is used to create the OSPF neighbor table?
Link-state database
Routing table
Adjacency database
Forwarding database
Which wildcard mask would be used to advertise the 192.168.5.96/27 network as part of an OSPF configuration?
255.255.255.224
0.0.0.32
255.255.255.223
0.0.0.31
The following three networks are directly connected to an OSPF router; 192.168.0.0/24, 192.168.1.0/24, and 192.168.2.0/24. Which OSPF network command would advertise only the 192.168.1.0 network to neighbors?
router(config-router)#network 192.168.1.0 0.0.0.255 area 0
router(config-router)#network 192.168.0.0 0.0.15.255 area 0
router(config-router)#network 192.168.1.0 0.0.0.0 area 0
router(config-router)#network 192.168.1.0 255.255.255.255 area 0
Which verification command would identify the specific interfaces on a router that were configured with the passive-interface command?
show ip route eigrp
show ip protocols
show ip eigrp neighbors
show ip interface brief
What is the first criterion used by OPSF routers to elect a DR?
highest MAC address
highest priority
highest ip address
highest router ID
The IT department is reporting that a company web server is receiving an abnormally high number of web page requests from different locations simultaneously. Which type of security attack is occurring?
social engineering
spyware
adware
phishing
DDoS
Which objective of secure communications is achieved by encrypting data?
availability
integrity
authentication
confidentiality
Which algorithm can ensure data confidentiality?
AES
RSA
PKI
MD5
What specialized network device is responsible for enforcing access control policies between networks?
bridge
firewall
IDS
switch
A network administrator configures an ACL with the command R1(config)# access-list 1 permit 172.16.0.0 0.0.15.255. Which two IP addresses will match this ACL statement? (Choose two.)
172.16.31.24
172.16.65.21
172.16.16.12
172.16.0.255
172.16.15.36
What single access list statement matches all of the following networks?
192.168.16.0
192.168.17.0
192.168.18.0
192.168.19.0
access-list 10 permit 192.168.0.0 0.0.15.255
access-list 10 permit 192.168.16.0 0.0.15.255
access-list 10 permit 192.168.16.0 0.0.3.255
access-list 10 permit 192.168.16.0 0.0.0.255
When creating an ACL, which keyword should be used to document and interpret the purpose of the ACL statement on a Cisco device?
established
eq
description
remark
A college student is studying for the Cisco CCENT certification and is visualizing extended access lists. Which three keywords could immediately follow the keywords permit or deny as part of an extended access list? (Choose three.)
www
tcp
udp
telnet
icmp
Consider the configured access list.
R1# show access-lists
extended IP access list 100
deny tcp host 10.1.1.2 host 10.1.1.1 eq telnet
deny tcp host 10.1.2.2 host 10.1.2.1 eq telnet
permit ip any any (15 matches)
What are two characteristics of this access list? (Choose two.)
The access list has been applied to an interface
A network administrator would not be able to tell if the access list has been applied to interface or not
Any device on the 10.1.1.0/24 network (except the 10.1.1.2 device) can telnet to the router that has the ip address 10.1.1.1 assigned
The 10.1.2.1 is not allowed to telnet to the 10.1.2.2 device
Any device can telnet to the 10.1.2.1 device
To facilitate the troubleshooting process, which inbound ICMP message should be permitted on an outside interface?
echo reply
time-stamp reply
router advertisement
time-stamp request
echo request
An administrator has configured an access list on R1 to allow SSH administrative access from host 172.16.1.100. Which command correctly applies the ACL?
R1(config-line)#access-class 1 out
R1(config-if)#ip access-group 1 out
R1(config-line)#access-class 1 in
R1(config-if)#ip access-group 1 in
Consider the following output for an ACL that has been applied to a router via the access-class in command. What can a network administrator determine from the output that is shown?
R1# <output omitted>
Standard IP access list 2
10 permit 192.168.10.0, wildcard bits 0.0.0.255 (2 matches)
20 deny any (1 match)
Two devices were able to use SSH or Telnet to gain access to the router
Two devices connected to the router have ip addresses of 192.168.10.x
Traffic from two devices was allowed to enter one router port and be routed outbound to a different router port
Traffic from one device was not allowed to come into one router port and be routed outbound to a different router port
A company is expanding its business to other countries. All branch offices must remain connected to corporate headquarters at all times. Which network technology is required to support this scenario?
MAN
WAN
LAN
WLAN
Which medium do service providers use to transmit data over WAN connections with SONET, SDH, and DWDM?
Wi-Fi
Satelite
Copper
Fiber optic
Which type of network would be used by a company to connect locations across the country?
WLAN
SAN
WAN
LAN
What are two common types of circuit-switched WAN technologies? (Choose two.)
Frame Relay
ATM
ISDN
PSTN
DSL
What function is performed by the OSPF designated router?
summarizing routes between areas
redistribution of external routes into OSPF
maintaining the link-state database
dissemination of LSAs
A router in an OSPF enterprise network has a default static route that has been configured via the interface that connects to the ISP. Which command would the network administrator apply on this router so that other routers in the OSPF network will use this default route?
redistributes static subnets
default-information originate
redistribute static
redistribute connected
Which type of DNS attack involves the cybercriminal compromising a parent domain and creating multiple subdomains to be used during the attacks?
cache poisoning
amplification and reflection
tunneling
shadowing
Which operator is used in an ACL statement to match packets of a specific application?
gt
lt
eq
established
Which two commands will configure a standard ACL? (Choose two.)
Router(config)# access-list 20 permit host 192.168.5.5 any any
Router(config)# access-list 10 permit 10.20.5.0 0.255.255.255 any
Router(config)# access-list 90 permit 192.168.10.5 0.0.0.0
Router(config)# access-list 45 permit 192.168.200.4 host
Router(config)# access-list 35 permit host 172.31.22.7
A new corporation needs a data network that must meet certain requirements. The network must provide a low cost connection to sales people dispersed over a large geographical area. Which two types of WAN infrastructure would meet the requirements? (Choose two.)
Internet
private infrastructure
public infrastructure
dedicated
satelite
What algorithm is used to provide data integrity of a message through the use of a calculated hash value?
HMAC
DH
RSA
AES
How many packet types does EIGRP use for inter-router communication?
Three
Four
Five
Six
Seven
What is an EIGRP successor?
The next-hop router for the path with the lowest path metric for a destination prefix
The path with the lowest metric for a destination prefix
The router selected to maintain the EIGRP adjacencies for a broadcast network
A route that satisfies the feasibility condition where the reported distance is less than the feasible distance
True or false: The EIGRP router ID (RID) must be configured for EIGRP to be able to establish neighborship.
True
False
Which value can be modified on a router to manipulate the path taken by EIGRP but does not have impacts on other routing protocols, like OSPF?
Interface bandwidth
Interface MTU
Interface delay
Interface priority
The K1 value refers to which parameter to calculate the metric?
Delay
MTU
Load
Bandwidth
Reliability
What is a feature of the OSPF routing protocol?
The SPF algorithm chooses the best path based on 30 seconds updates
Routers can be grouped into autonomous systems to support a hierarchical system
OSPF authentication is configured in the same way on IPv4 and IPv6 networks
It scales well in both small and large networks
What are two features of the OSPF routing protocol? (Choose two.)
Has an administrative distance of 100
Uses Dijkstra's algorithm to build the SPF tree
automatically summarizes networks at the classful boundaries
Calculates its metric using bandwidth
Used primarily as an EGP
A network administrator is configuring an ACL to restrict access to certain servers in the data center. The intent is to apply the ACL to the interface connected to the data center LAN. What happens if the ACL is incorrectly applied to an interface in the inbound direction instead of the outbound direction?
The ACL will analyze traffic after it is routed to the outbound interface
All traffic is permitted
The ACL does not perform as designed
All traffic is denied
