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WAN Technologies CH 6-7 Exam

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WAN Technologies CH 6-7 Exam
Anthony Schulmeister
Quiz por Anthony Schulmeister, atualizado more than 1 year ago
Anthony Schulmeister
Criado por Anthony Schulmeister aproximadamente 8 anos atrás
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Resumo de Recurso

Questão 1

Questão
Which DSL technology provides higher downstream bandwidth to the user than upstream bandwidth?
Responda
  • CDMA
  • SDSL
  • TDMA
  • ADSL

Questão 2

Questão
What two layers of the OSI model are defined by DOCSIS? (Choose two.)
Responda
  • Layer 1
  • Layer 2
  • Layer 3
  • Layer 4
  • Layer 5
  • Layer 6
  • Layer 7

Questão 3

Questão
What are two features of wavelengths in the electromagnetic spectrum? (Choose two.)
Responda
  • They are the distance from the peak of one radio wave to the trough of the next radio wave.
  • They are the distance from the peak of one radio wave to the peak of the next radio wave.
  • They are calculated by the speed of propagation of the electromagnetic signal divided by its frequency in cycles per second.
  • They are the rate at which current or voltage cycles occur.
  • They are calculated by the number of waves per second.

Questão 4

Questão
Which two network components does a teleworker require to connect remotely and securely from home to the corporate network? (Choose two.)
Responda
  • VPN server or concentrator
  • VPN client software or VPN-enabled router
  • authentication server
  • broadband Internet connection
  • multifunction security appliance

Questão 5

Questão
What are two Layer 2 WAN technologies that can provide secure remote connections between corporate branch offices? (Choose two.)
Responda
  • QoS
  • Frame Relay
  • leased lines
  • LTE
  • IPsec

Questão 6

Questão
What are two characteristics of a PPPoE configuration on a Cisco customer router? (Choose two.)
Responda
  • An MTU size of 1492 bytes is configured on the Ethernet interface
  • The PPP configuration is on the dialer interface
  • The dialer pool command is applied to the Ethernet interface to link it to the dialer interface.
  • The customer router CHAP username and password are independent of what is configured on the ISP router.
  • The Ethernet interface does not have an IP address

Questão 7

Questão
Which cable network communication technology is secure, extremely resistant to noise, and employs spread-spectrum technology?
Responda
  • TDMA
  • FDMA
  • S-CDMA
  • CDMA

Questão 8

Questão
Which standard specifies the channel frequencies and the deterministic access method of cable networks?
Responda
  • WiMAX
  • DOCSIS
  • 802.16
  • LTE

Questão 9

Questão
Which technology provides a secure connection between a SOHO and the headquarters office?
Responda
  • VPN
  • PPPoE
  • WiMax
  • QoS

Questão 10

Questão
What mobile broadband communication Layer 2 technology uses a special coding scheme to assign each transmitter a specific code?
Responda
  • TDMA
  • UMTS
  • FDMA
  • CDMA

Questão 11

Questão
Which type of long distance telecommunication technology provides point-to-point connections and cellular access?
Responda
  • mobile broadband
  • municipal Wi-Fi
  • satellite
  • WiMax

Questão 12

Questão
Which medium is used for delivering data via DSL technology through PSTN?
Responda
  • fiber
  • copper
  • wireless
  • radio frequency

Questão 13

Questão
What technology provides service providers the capability to use authentication, accounting, and link management features to customers over Ethernet networks?
Responda
  • PPPoE
  • ISDN
  • DSL
  • QoS

Questão 14

Questão
Which broadband wireless technology is based on the 802.11 standard?
Responda
  • UMTS
  • CDMA
  • WiMAX
  • municipal Wi-Fi

Questão 15

Questão
Which broadband technology would be best for a user that needs remote access when traveling in mountains and at sea?
Responda
  • WiMax
  • mobile broadband
  • Wi-Fi Mesh
  • satellite

Questão 16

Questão
What are two disadvantages of employing teleworkers in an organization? (Choose two.)
Responda
  • increase in office expenses
  • slower customer service response times
  • increased difficulty of tracking task progress
  • the need to implement a new management style
  • increased usage of sick or vacation days

Questão 17

Questão
A company is looking for the least expensive broadband solution that provides at least 10 Mb/s download speed. The company is located 5 miles from the nearest provider. Which broadband solution would be appropriate?
Responda
  • WiMax
  • satellite
  • DSL
  • cable

Questão 18

Questão
What functionality is required on routers to provide remote workers with VoIP and videoconferencing capabilities?
Responda
  • PPPoE
  • VPN
  • QoS
  • IPsec

Questão 19

Questão
How is voice traffic affected when the customer uses ADSL technology?
Responda
  • No special equipment is needed to separate voice and data signals.
  • ADSL signals can distort voice transmissions
  • Voice signals are on a separate wire pair from ADSL signals
  • Voice traffic is interrupted if the ADSL service fails

Questão 20

Questão
What advantage does DSL have compared to cable technology?
Responda
  • DSL has no distance limitations.
  • DSL is faster.
  • DSL is not a shared medium.
  • DSL upload and download speeds are always the same.

Questão 21

Questão
Which two OSI Layer 1 specifications does DOCSIS define for a cable Internet connection? (Choose two.)
Responda
  • the separation of the voice and data transmissions
  • VPN tunneling requirements
  • modulation technique
  • a deterministic media access method
  • channel bandwidth

Questão 22

Questão
Why is the MTU for a PPPoE DSL configuration reduced from 1500 bytes to 1492?
Responda
  • to establish a secure tunnel with less overhead
  • to accommodate the PPPoE headers
  • to reduce congestion on the DSL link
  • to enable CHAP authentication

Questão 23

Questão
When PPPoE is configured on a customer router, which two commands must have the same value for the configuration to work? (Choose two.)
Responda
  • ppp chap password 2
  • ppp chap hostname 2
  • interface gigabitethernet 0/2
  • dialer pool 2
  • pppoe-client dial-pool-number 2
  • interface dialer 2

Questão 24

Questão
Two corporations have just completed a merger. The network engineer has been asked to connect the two corporate networks without the expense of leased lines. Which solution would be the most cost effective method of providing a proper and secure connection between the two corporate networks?
Responda
  • site-to-site VPN
  • Cisco Secure Mobility Clientless SSL VPN
  • Cisco AnyConnect Secure Mobility Client with SSL
  • Frame Relay
  • remote access VPN using IPsec

Questão 25

Questão
How can the use of VPNs in the workplace contribute to lower operating costs?
Responda
  • VPNs require a subscription from a specific Internet service provider that specializes in secure connections.
  • High-speed broadband technology can be replaced with leased lines.
  • VPNs can be used across broadband connections rather than dedicated WAN links.
  • VPNs prevents connectivity to SOHO users.

Questão 26

Questão
A network design engineer is planning the implementation of an IPsec VPN. Which hashing algorithm would provide the strongest level of message integrity?
Responda
  • SHA-1
  • AES
  • MD5
  • 512-bit SHA

Questão 27

Questão
Refer to the exhibit. A tunnel was implemented between routers R1 and R2. Which two conclusions can be drawn from the R1 command output? (Choose two.)
Image:
74922765-524a-44bf-baff-709be83b9fbe (image/png)
Responda
  • This tunnel mode provides encryption.
  • A GRE tunnel is being used.
  • This tunnel mode does not support IP multicast tunneling
  • This tunnel mode is not the default tunnel interface mode for Cisco IOS software.
  • The data that is sent across this tunnel is not secure

Questão 28

Questão
Which two characteristics describe IPsec VPNs? (Choose two.)
Responda
  • IPsec is specifically designed for web-enabled applications
  • Specific PC client configuration is required to connect to the VPN
  • IPsec authenticates by using shared secrets or digital certificates
  • IPsec authentication is one-way or two-way
  • Key lengths range from 40 bits to 256 bits

Questão 29

Questão
How is "tunneling" accomplished in a VPN?
Responda
  • Packets are disguised to look like other types of traffic so that they will be ignored by potential attackers.
  • New headers from one or more VPN protocols encapsulate the original packets.
  • All packets between two hosts are assigned to a single physical medium to ensure that the packets are kept private
  • A dedicated circuit is established between the source and destination devices for the duration of the connection.

Questão 30

Questão
Which service of IPsec verifies that secure connections are formed with the intended sources of data?
Responda
  • authentication
  • confidentiality
  • data integrity
  • encryption

Questão 31

Questão
Which two scenarios are examples of remote access VPNs? (Choose two.)
Responda
  • A mobile sales agent is connecting to the company network via the Internet connection at a hotel.
  • A toy manufacturer has a permanent VPN connection to one of its parts suppliers.
  • All users at a large branch office can access company resources through a single VPN connection.
  • An employee who is working from home uses VPN client software on a laptop in order to connect to the company network.
  • A small branch office with three employees has a Cisco ASA that is used to create a VPN connection to the HQ.

Questão 32

Questão
What is an advantage of using the Cisco Secure Mobility Clientless SSL VPN?
Responda
  • Security is provided by prohibiting network access through a browser.
  • Clients do not require special software.
  • Any device can connect to the network without authentication.
  • Clients use SSH to access network resources.

Questão 33

Questão
Which critical function that is provided by IPsec ensures that data has not been changed in transit between the source and destination?
Responda
  • confidentiality
  • authentication
  • integrity
  • anti-replay protection

Questão 34

Questão
Which statement describes a feature of site-to-site VPNs?
Responda
  • The VPN connection is not statically defined.
  • Internal hosts send normal, unencapsulated packets
  • VPN client software is installed on each host
  • Individual hosts can enable and disable the VPN connection

Questão 35

Questão
What is an IPsec protocol that provides data confidentiality and authentication for IP packets?
Responda
  • AH
  • IKE
  • ESP
  • RSA

Questão 36

Questão
What is the purpose of utilizing Diffie-Hellman (DH) algorithms as part of the IPsec standard?
Responda
  • DH algorithms allow two parties to establish a shared public key that is used by encryption and hash algorithms.
  • DH algorithms allow two parties to establish a shared secret key that is used by encryption and hash algorithms.
  • DH algorithms allow unlimited parties to establish a shared secret key that is used by encryption and hash algorithms.
  • DH algorithms allow unlimited parties to establish a shared public key that is used by encryption and hash algorithms.

Questão 37

Questão
Which statement correctly describes IPsec?
Responda
  • IPsec uses algorithms that were developed specifically for that protocol
  • IPsec implements its own method of authentication.
  • IPsec is a Cisco proprietary standard
  • IPsec works at Layer 3, but can protect traffic from Layer 4 through Layer 7.

Questão 38

Questão
Which two algorithms use Hash-based Message Authentication Code for message authentication? (Choose two.)
Responda
  • AES
  • SHA
  • 3DES
  • MD5
  • DES

Questão 39

Questão
What key question would help determine whether an organization should use an SSL VPN or an IPsec VPN for the remote access solution of the organization?
Responda
  • Do users need to be able to connect without requiring special VPN software?
  • What applications or network resources do the users need for access?
  • Are both encryption and authentication required?
  • Is a Cisco router used at the destination of the remote access tunnel?

Questão 40

Questão
What is the purpose of a message hash in a VPN connection?
Responda
  • It ensures that the data is coming from the correct source.
  • It ensures that the data has not changed while in transit.
  • It ensures that the data cannot be read in plain text.
  • It ensures that the data cannot be duplicated and replayed to the destina

Questão 41

Questão
Which remote access implementation scenario will support the use of generic routing encapsulation tunneling?
Responda
  • a mobile user who connects to a SOHO site
  • a mobile user who connects to a router at a central site
  • a central site that connects to a SOHO site without encryption
  • a branch office that connects securely to a central site

Questão 42

Questão
A network design engineer is planning the implementation of a cost-effective method to interconnect multiple networks securely over the Internet. Which type of technology is required?
Responda
  • a VPN gateway
  • a GRE IP tunnel
  • a leased line
  • a dedicated ISP

Questão 43

Questão
Refer to the exhibit. Which IP address would be configured on the tunnel interface of the destination router?
Image:
8b1aacbf-a183-471e-beb3-f11d2f4ed40f (image/png)
Responda
  • 172.16.1.2
  • 209.165.200.225
  • 172.16.1.1
  • 209.165.200.226

Questão 44

Questão
Which algorithm is an asymmetrical key cryptosystem?
Responda
  • AES
  • DES
  • RSA
  • 3DES

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