CCNA4 Computer Exam 2023
Which two statements about DSL are true? (Choose two)
-users are on a shared medium
-users RF signal transmission
-local loop
... [Show More] can be up to 3.5 miles (5.5km)
-physical and data link layers are defined by DOCSIS
-user connections are aggregated at a DSLAM located at the CO - Answer--local loop
can be up to 3.5 miles (5.5km)
-user connections are aggregated at a DSLAM located at the CO
Which two statements are true regarding a PPP connection between two Cisco routers?
(choose two)
-LCP tests the quality of the link
-LCP manages compression on the link
-only a single NCP is allowed between the two routers
-NCP terminates the link when data exchange is complete
-with CHAP authentication, the routers exchange plain test passwords - Answer--LCP
tests the quality of the link
-LCP manages compression on the link
A network administrator is asked to design a system to allow simultaneous access to
the Internet for 250 users. The ISP can only supply five public IP addresses for this
network. What technology can the administrator use to accomplish this task?
-classful subnetting
-variable length subnet mask
-classless interdomain routing
-port-based network address translation - Answer-Port-based network address
translation
What is the expected behavior of an ADSL service?
-the download rate is faster than the upload rate
-the upload rate is faster than the download rate
-the download and upload rates are the same
-the user can select the upload and download rates base on need - Answer-The
download rate is faster than the upload rate
A network administrator is troubleshooting the dynamic NAT that is configured on router
R2. Which command can the administrator use to see the total number of active NAT
translations and the number of addresses that are allocated from the NAT pool?
-R2# show ip NAT statistics
-R2# show ip NAT translations
-R2# show running-config
-R2# clear ip NAT translation - Answer-R2# show ip NAT statistics
Which type of traffic would most likely have problems when passing through a NAT
device?
-Telnet
-IPsec
-HTTP
-ICMP
-DNS - Answer-IPsec
R1(config)# ip nat inside source static tcp 10.1.1.1 23 209.165.201.25 2323
What kind of NAT is being configured on R1?
-PAT
-dynamic NAT
-NAT overload
-port forwarding - Answer-Port forwarding
What benefit does NAT64 provide?
-it allows sits to use private IPv6 addresses and translates them to global IPv6
addresses
-it allows sites to connect multiple IPv4 hosts to the Internet via the use of a single
public IPv4 address
-it allows sites to connect IPv6 hosts to an IPv4 network by translating the IPv6
addresses to IPv4 addresses
-it allows sites to use private IPv4 addresses, and thus hides the internal addressing
structure from hosts on public IPv4 networks - Answer-It allows sites to connect the
IPv6 hosts to an IPv4 network by translating the IPv6 addresses to IPv4 addresses
What are three benefits of using Frame Relay for WAN connectivity? (Choose three)
-QoS support using IP precedence field
-one physical interface that can be used for several circuits
-integrated encryption
-mature technology
-reasonable cost
-seamless direct connectivity to an Ethernet WAN - Answer--one physical interface that
can be used for several circuits
-mature technology
-reasonable cost
The DLCI number assigned to a Frame Relay circuit is to be manually added on a pointto-point link. Which three subinterface commands could be used to complete the
configuration? (Choose three)
-bandwidth kilobits
-encapsulation frame-relay
-frame-relay interface-dlci (dlci)
-frame-relay map ip (ip-address) dlci
-frame-relay map ip (ip-address) dlci broadcast
-ip address (ip-address) (mask)
-no shutdown - Answer--bandwidth kilobits
-frame-relay interface-dlci (dlci)
-ip address (ip-address) (mask)
Which command can be use to check the information about congestion on a Frame
Relay link?
-show frame-relay pvc
-show frame-relay lmi
-show interfaces
-show frame-relay map - Answer-Show frame-relay pvc
A network administrator is configuring a PPP link with the commands:
R1(config-if)# encapsulation ppp
R1(config-if)# ppp quality 70
What is the effect of these commands?
-the PPP link will be closed down if the link quality drops below 70%
-the NCP will send a message to the sending device if the link usage reaches 70%
-the LCP establishment phase will not start until the bandwidth reaches 70% or more
-the PPP link will not be established if more than 30% of options cannot be accepted -
Answer-The PPP link will be closed down if the link quality drops below 70%
R1(config)# int s0/1/0
R1(config-if)# ip address 192.168.14.1 255.255.255.252
R1(config-if)# encapsulation frame-relay ietf
R1(config-if)# frame-relay map ip 192.168.14.5 201
R1(config-if)# frame-relay lmi-type q933a
R1(config-if)#exit
R1(config)#router ospf 10
R1(config-router)#network 192.168.14.0 0.0.0.3 area 0
R1(config-router)# passive-interface s0/1/1
What is missing from the configuration that would be preventing OSPF routing updates
from passing to the Frame Relay service provider?
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