CCNA 5.0 (CCNA R&S) – Connecting Networks Final Exam P1
1
Why is it useful to categorize networks by size when discussing network design?
Knowing the number of connected devices will define how many multilayer switches will be necessary at the core layer.
Knowing the number of connected devices will define how many additional layers will be added to the three-tier hierarchical network design.
A high-level redundancy at the access layer may be better implemented if the number of connected devices is known.
The complexity of networking infrastructure will vary according to the number of connected devices.
2
What is one advantage to designing networks in building block fashion for large companies?
failure isolation
increased network access time
coarse security control
fewer required physical resources
3
Which network module maintains the resources that employees, partners, and customers rely on to effectively create, collaborate, and interact with information?
access-distribution
services
data center
enterprise edge
4
A company connects to one ISP via multiple connections. What is the name given to this type of connection?
single-homed
multihomed
dual-multihomed
dual-homed
5
Which circumstance would result in an enterprise deciding to implement a corporate WAN?
when its employees become distributed across many branch locations
when the network will span multiple buildings
when the number of employees exceeds the capacity of the LAN
when the enterprise decides to secure its corporate LAN
6
What is a disadvantage of a packet-switched network compared to a circuit-switched network?
higher cost
fixed capacity
less flexibility
higher latency
7
Which statement describes a characteristic of dense wavelength division multiplexing (DWDM)?
It supports the SONET standard, but not the SDH standard.
It enables bidirectional communications over one pair of copper cables.
It can be used in long-range communications, like connections between ISPs.
It assigns incoming electrical signals to specific frequencies.
8
Under which two categories of WAN connections does Frame Relay fit? (Choose two.)
public infrastructure
private infrastructure
dedicated
Internet
packet-switched
9
Which WAN technology can serve as the underlying network to carry multiple types of network traffic such as IP, ATM, Ethernet, and DSL?
ISDN
MPLS
Frame Relay
Ethernet WAN
10
The security policy in a company specifies that the staff in the sales department must use a VPN to connect to the corporate network to access the sales data when they travel to meet customers. What component is needed by the sales staff to establish a remote VPN connection?
VPN gateway
VPN appliance
VPN concentrator
VPN client software
11
An intercity bus company wants to offer constant Internet connectivity to the users traveling on the buses. Which two types of WAN infrastructure would meet the requirements? (Choose two.)
private infrastructure
public infrastructure
dedicated
circuit-switched
cellular
12
How many 64 kb/s voice channels are combined to produce a T1 line?
8
16
24
32
13
Which two characteristics describe time-division multiplexing? (Choose two.)
Traffic is allocated bandwidth across a single wire based on preassigned time slots.
Bandwidth is allocated to channels based on whether a station has data to transmit.
Encoding technology provides high data throughput in a minimum RF spectrum by supporting parallel data transmission.
Depending on the configured Layer 2 protocol, data is transmitted across two or more channels via the use of time slots.
Data capacity across a single link increases as bits from multiple sources are transmitted using interleaved slices of time.
14
Which two characteristics describe time-division multiplexing? (Choose two.)
Traffic is allocated bandwidth across a single wire based on preassigned time slots.
Bandwidth is allocated to channels based on whether a station has data to transmit.
Encoding technology provides high data throughput in a minimum RF spectrum by supporting parallel data transmission.
Depending on the configured Layer 2 protocol, data is transmitted across two or more channels via the use of time slots.
Data capacity across a single link increases as bits from multiple sources are transmitted using interleaved slices of time.
15
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 text passwords.
16
ccna 5.0 s4 – 16
Refer to the exhibit. Which three steps are required to configure Multilink PPP on the HQ router? (Choose three.)
Assign the serial interfaces to the multilink bundle.
Assign the Fast Ethernet interface to the multilink bundle.
Enable PPP encapsulation on the multilink interface.
Enable PPP encapsulation on the serial interfaces.
Bind the multilink bundle to the Fast Ethernet interface.
Create and configure the multilink interface.
17
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 percent.
The NCP will send a message to the sending device if the link usage reaches 70 percent.
The LCP establishment phase will not start until the bandwidth reaches 70 percent or more.
The PPP link will not be established if more than 30 percent of options cannot be accepted.
18
What are three benefits of using Frame Relay for WAN connectivity? (Choose three.)
QoS support using the 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 LAN
19
Which three parts of a Frame Relay Layer 2 PDU are used for congestion control? (Choose three.)
the 10-bit DLCI
the Extended Address field
the C/R bit
the FECN bit
the BECN bit
the DE bit
20
What is a characteristic of Frame Relay that allows customer data transmissions to dynamically “burst” over their CIR for short periods of time?
The combination of LMI status messages and Inverse ARP messages enables the CIR to be exceeded.
The physical circuits of the Frame Relay network are shared between subscribers and there may be times when unused bandwidth is available.
Bursting is enabled by the configuration of multiple subinterfaces on one physical interface.
BECN and FECN messages notify the router that the CIR can be exceeded.
21
ccna 5.0 s4 – 21
Refer to the exhibit. A network administrator has implemented the configuration in the displayed output. What is missing from the configuration that would be preventing OSPF routing updates from passing to the Frame Relay service provider?
The passive-interface command has not been issued on interface serial 0/1/0.
The broadcast keyword has not been issued.
The directly connected neighbor should have been identified by using static mapping.
The command to disable split horizon has not been issued.
22
The DLCI number assigned to a Frame Relay circuit is to be manually added on a point-to-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
23
Which command can be used 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
24
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 masks
classless interdomain routing
port-based Network Address Translation
25
Which type of traffic would most likely have problems when passing through a NAT device?
Telnet
IPsec
HTTP
ICMP
DNS
26
ccna 5.0 s4 – 26
Refer to the exhibit. The inside local IP address of PC-A is 192.168.0.200. What will be the inside global address of packets from PC-A after they are translated by R1?
10.0.0.1
172.16.0.1
192.168.0.1
192.168.0.200
209.165.200.225
27
ccna 5.0 s4 – 27
Refer to the exhibit. What kind of NAT is being configured on R1?
PAT
dynamic NAT
NAT overload
port forwarding
28
What benefit does NAT64 provide?
It allows sites 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.
29
ccna 5.0 s4 – 29
Refer to the exhibit. An administrator is configuring NAT to provide Internet access to the inside network. After the configuration is completed, users are unable to access the Internet. What is the cause of the problem?
The NAT pool is using an invalid address range.
The inside and outside interfaces are backwards.
The ACL is referencing the wrong network address.
The NAT inside source command is referring to the wrong ACL.
30
Which two technologies are implemented by organizations to support teleworker remote connections? (Choose two.)
CMTS
CDMA
DOCSIS
VPN
IPsec
Đáp án
1-4
2-1
3-3
4-4
5-1
6-4
7-3
8-2,5
9-2
10-4
11-2,5
12-3
13-1,5
14-4
15-1,2
16-1,4,6
17-1
18-2,4,5
19-4,5,6
20-2
21-2
22-1,3,6
23-1
24-4
25-2
26-5
27-4
28-3
29-4
30-4,5
P2