DRSEnt Chapter 1 – CCNA Discovery: Introducing Routing and
Switching in the Enterprise (Version 4.0)
1. The ABC Corporation implements the network for its new
headquarters using the Cisco Enterprise Architecture. The network administrator
wants to filter the traffic from and to the outside world. Where should the
administrator deploy a firewall device?
server farm
enterprise edge
enterprise campus
service provider edge
2. How does a VPN work to support remote user productivity?
It uses SSL to encrypt remote user logins to the corporate
intranet.
It uses secure Telnet for remote user connections to internal
network devices.
It creates a virtual circuit that allows real-time
communications between any two Internet endpoints.
It uses encapsulation to create a secure tunnel for
transmission of data across non-secure networks.
3. In which functional area of the Cisco Enterprise
Architecture should IDS and IPS be located to detect and prevent malicious
activity from outside?
enterprise campus
WAN and Internet
enterprise edge
service provider edge
4. Which functional component of the Cisco Enterprise
Architecture is responsible for hosting internal servers?
enterprise campus
enterprise edge
service provider edge
building distribution
5. What does VoIP provide to telecommuters?
high-quality, live-video presentations
real-time voice communications over the Internet
ability to share desktop applications simultaneously
secure, encrypted data transmissions through the Internet
6. What are two important guidelines when using packet
sniffers to determine traffic flow patterns? (Choose two.)
Capture only traffic from a single application at a time.
Perform the capture on several different network segments.
Create a baseline capture during a low or non-utilization
period.
Relocate highly active servers before attempting the capture.
Capture traffic during peak utilization times.
7. What is the purpose of the Cisco Enterprise
Architecture?
remove the three-layer hierarchical model and use a flat
network approach
divide the network into functional components while still
maintaining the concept of Core, Distribution, and Access Layers
provide services and functionality to the core layer by
grouping various components into a single component located in the access layer
reduce overall network traffic by grouping server farms,
the management server, corporate intranet, and e-commerce routers in the same
layer
8. Which three items can be discovered by using a packet
sniffer application? (Choose three.)
network transmission speed
source IP address
Ethernet frame type
duplex operational status
near-end crosstalk (NEXT) level
TCP sequence number
9. Which two statements are reasons why UDP is used for
voice and video traffic instead of TCP? (Choose two.)
TCP requires all data packets to be delivered for the data
to be usable.
The acknowledgment process of TCP introduces delays that
break the streams of data.
UDP does not have mechanisms for retransmitting lost
packets.
UDP tolerates delays and compensates for them.
TCP is a connectionless protocol that provides end-to-end
reliability.
UDP is a connection-oriented protocol that provides
end-to-end reliability.
10. What is a benefit of having an extranet?
It provides web-like access to company information for
employees only.
It limits access to corporate information to secure VPN or
remote access connections only.
It allows customers and partners to access company
information by connecting to a public web server.
It allows suppliers and contractors to access confidential
internal information using controlled external connections.
11. Which protocol and process could be implemented on a
network to ensure that a telecommuter can attend a training presentation via
the use of VoIP and still experience uninterrupted data streams and quality
conversations?
TCP and QoS
UDP and QoS
TCP and queuing
UDP and VPN
TCP and VPN
12. Which two measures help ensure that a hardware problem
does not cause an outage in an enterprise LAN that supports mission critical
services? (Choose two.)
providing failover capability
installing redundant power supplies
purchasing more bandwidth from the ISP
enabling half-duplex connectivity to access layer devices
installing routers that can handle a greater amount of
throughput
13. What are two benefits of controlling the flow of
traffic in an enterprise network? (Choose two.)
security
smaller failure domains
more reliable transaction processing
bandwidth optimization
local control of network services
14. Why is TCP the preferred Layer 4 protocol for
transmitting data files?
TCP is more reliable than UDP because it requires lost
packets to be retransmitted.
TCP requires less processing by the source and destination
hosts than UDP.
UDP introduces delays that degrade the quality of the data
applications.
TCP ensures fast delivery because it does not require
sequencing or acknowledgements.
15. A remote user needs to access a networking device on
the internal network of the company. The transactions between the remote user
and the device must be secure. Which protocol enables this to happen securely?
HTTP
SSH
Telnet
FTP
16. Which statement describes the difference between an
enterprise WAN and an enterprise extranet?
An enterprise WAN is designed to interconnect local LANs,
while an enterprise extranet is designed to interconnect remote branch offices.
An enterprise WAN is designed to interconnect branch
offices, while an enterprise extranet is designed to give access to external
business partners.
An enterprise WAN is designed to provide remote access for
its teleworkers, while an enterprise extranet is designed to provide Internet
connectivity for the enterprise.
An enterprise WAN is designed to provide Internet
connectivity for the enterprise, while an enterprise extranet is designed to
provide remote access to the enterprise network for teleworkers.
17. What are two benefits to an employee of teleworking?
(Choose two.)
reduced commuting costs
reduced network complexity
reduced need for support staff
reduced need for expensive business attire
reduced security risks to the network infrastructure
18. What are two important characteristics or functions of
devices at the Enterprise Edge? (Choose two.)
providing Internet, telephone, and WAN services to the
enterprise network
providing a connection point for end-user devices to the
enterprise network
providing high-speed backbone connectivity with redundant
connections
providing intrusion detection and intrusion prevention to
protect the network against malicious activity
providing packet inspection to determine if incoming
packets should be allowed on the enterprise network
19. What can be found at the enterprise edge?
Internet, VPN, and WAN modules
Internet, PSTN, and WAN services
server farms and network management
campus infrastructure, including access layer devices
20. What type of traffic flow is always considered to be
external?
file sharing traffic
system updates
company e-mail
Internet bound traffic
transaction processing
21. A business consultant must use Internet websites to
research a report on the e-business strategies of several firms and then
electronically deliver the report to a group of clients in cities throughout
the world. Which two teleworker tools can the consultant use to accomplish this
project? (Choose two.)
VoIP
VPN
HTTP
Telnet
email
22. What is the main purpose of the Access Layer in a
hierarchically designed network?
performs routing and packet manipulation
supplies redundancy and failover protection
provides a high-speed, low-latency backbone
serves as a network connection point for end-user devices
23. Which task would typically only require services
located at the access layer of the hierarchical design model?
connecting to the corporate web server to update sales
figures
using a VPN from home to send data to the main office
servers
printing a meeting agenda on a local departmental network
printer
placing a VoIP call to a business associate in another
country
responding to an e-mail from a co-worker in another
department
24. Which two solutions would an enterprise IT department
use to facilitate secure intranet access for remote workers? (Choose two.)
VPN
NAT
user authentication
client firewall software
packet sniffing
No comments:
Post a Comment