1 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 VPN2 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

email3 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.4 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.

1.2.3 Network Traffic Prioritization

Voice traffic and video traffic are different from data traffic. Voice and video applications require an uninterrupted stream of data to ensure high quality conversations and images. The acknowledgement process in TCP introduces delays, which break these streams and degrade the quality of the application. Therefore, voice and video applications employ User Datagram Protocol (UDP) instead of TCP. Since UDP does not have mechanisms for retransmitting lost packets, it minimizes delays.

Traffic suara dan video berbeda dari lalu lintas data. Suara dan aplikasi video streaming yang tidak terganggu memerlukan data dan gambar untuk memastikan percakapan berkualitas tinggi. Proses

pengakuan dalam TCP memperkenalkan penundaan, yang memecah stream-stream dan menurunkan kualitas aplikasi. Oleh karena itu, suara dan aplikasi video menggunakan User Datagram Protocol (UDP) bukan TCP. Karena UDP tidak memiliki mekanisme untuk mentransmisi ulang paket yang hilang, itu meminimalkan penundaan

5 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

TelnetFTP

1.3.2 Virtual Private NetwokrsOne solution is to always use the secure forms of applications, if they exist. For example, instead of using Telnet, use SSH. Unfortunately, secure forms of all applications may not be available. A much easier choice is to encrypt all traffic moving between the remote site and the enterprise network using Virtual Private Networks (VPNs).

Salah satu solusinya adalah untuk selalu menggunakan bentuk aplikasi yang aman, jika mereka ada. Sebagai contoh, daripada menggunakan Telnet, menggunakan SSH. Sayangnya, bentuk aman semua aplikasi mungkin tidak tersedia. Sebuah pilihan yang lebih mudah adalah dengan mengenkripsi semua lalu lintas yang bergerak antara situs remote dan jaringan perusahaan menggunakan Virtual Private Networks (VPN).

6 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.

1.3.2 Virtual Private NetworksVPNs are often described as tunnels. Consider the analogy of an underground tunnel versus an open road way between two points. Anything that uses the underground tunnel to travel between the two points is surrounded and protected from view. The underground tunnel represents the VPN encapsulation and virtual tunnel.

VPN sering digambarkan sebagai terowongan. Pertimbangkan analogi sebuah terowongan bawah tanah dibandingkan dengan cara jalan terbuka antara dua titik. Apa pun yang menggunakan terowongan bawah tanah untuk perjalanan antara dua titik adalah dikelilingi dan dilindungi dari pandangan. Terowongan bawah tanah merupakan enkapsulasi VPN dan terowongan maya

7 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 number8 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 services9 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.

10 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 edge11 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 edge12 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 devices13 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 devices14 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 sniffing15 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 InternetWhat 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 network17 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 throughput18 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 department19 What type of traffic flow is always considered to be external?

file sharing traffic

system updates

company e-mail

Internet bound traffic

transaction processing20 What is the purpose of the Cisco Enterprise Architecture?

remove the three-layer hierarchical model and use a flat network approachdivide the network into functional components while still maintaining the concept of Core, Distribution, and Access Layersprovide services and functionality to the core layer by grouping various components into a single component located in the access layerreduce overall network traffic by grouping server farms, the management server, corporate intranet, and e-commerce routers in the same layer

21 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.22 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.

23 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 infrastructure24 Which functional component of the Cisco Enterprise Architecture is responsible for hosting internal servers?

enterprise campus

enterprise edge

service provider edge

building distribution