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WAN Technologies CH 6-7 Exam

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WAN Technologies CH 6-7 Exam
Anthony Schulmeister
Quiz by Anthony Schulmeister, updated more than 1 year ago
Anthony Schulmeister
Created by Anthony Schulmeister about 8 years ago
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Resource summary

Question 1

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

Question 2

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

Question 3

Question
What are two features of wavelengths in the electromagnetic spectrum? (Choose two.)
Answer
  • 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.

Question 4

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

Question 5

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

Question 6

Question
What are two characteristics of a PPPoE configuration on a Cisco customer router? (Choose two.)
Answer
  • 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

Question 7

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

Question 8

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

Question 9

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

Question 10

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

Question 11

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

Question 12

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

Question 13

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

Question 14

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

Question 15

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

Question 16

Question
What are two disadvantages of employing teleworkers in an organization? (Choose two.)
Answer
  • 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

Question 17

Question
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?
Answer
  • WiMax
  • satellite
  • DSL
  • cable

Question 18

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

Question 19

Question
How is voice traffic affected when the customer uses ADSL technology?
Answer
  • 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

Question 20

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

Question 21

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

Question 22

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

Question 23

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

Question 24

Question
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?
Answer
  • site-to-site VPN
  • Cisco Secure Mobility Clientless SSL VPN
  • Cisco AnyConnect Secure Mobility Client with SSL
  • Frame Relay
  • remote access VPN using IPsec

Question 25

Question
How can the use of VPNs in the workplace contribute to lower operating costs?
Answer
  • 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.

Question 26

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

Question 27

Question
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)
Answer
  • 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

Question 28

Question
Which two characteristics describe IPsec VPNs? (Choose two.)
Answer
  • 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

Question 29

Question
How is "tunneling" accomplished in a VPN?
Answer
  • 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.

Question 30

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

Question 31

Question
Which two scenarios are examples of remote access VPNs? (Choose two.)
Answer
  • 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.

Question 32

Question
What is an advantage of using the Cisco Secure Mobility Clientless SSL VPN?
Answer
  • 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.

Question 33

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

Question 34

Question
Which statement describes a feature of site-to-site VPNs?
Answer
  • 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

Question 35

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

Question 36

Question
What is the purpose of utilizing Diffie-Hellman (DH) algorithms as part of the IPsec standard?
Answer
  • 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.

Question 37

Question
Which statement correctly describes IPsec?
Answer
  • 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.

Question 38

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

Question 39

Question
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?
Answer
  • 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?

Question 40

Question
What is the purpose of a message hash in a VPN connection?
Answer
  • 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

Question 41

Question
Which remote access implementation scenario will support the use of generic routing encapsulation tunneling?
Answer
  • 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

Question 42

Question
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?
Answer
  • a VPN gateway
  • a GRE IP tunnel
  • a leased line
  • a dedicated ISP

Question 43

Question
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)
Answer
  • 172.16.1.2
  • 209.165.200.225
  • 172.16.1.1
  • 209.165.200.226

Question 44

Question
Which algorithm is an asymmetrical key cryptosystem?
Answer
  • AES
  • DES
  • RSA
  • 3DES
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