Practice final
Which two components of a WAN would more likely be used by an ISP? (Choose two.)
Toll network
DTE
CPE
CO
What are two advantages of packet switching over circuit switching? (Choose two.)
Multiple pairs of nodes can communicate over the same network channel.
A connection through the service provider network is established quickly before communications start.
A dedicated secure circuit is established between each pair of communicating nodes.
The communication costs are lower.
What are two common types of circuit-switched WAN technologies? (Choose two.)
ISDN
MPLS
ATM
PSTN
Frame Relay
Under which two categories of WAN connections does Frame Relay fit? (Choose two.)
Packet-switched
Public infrastructure
Dedicated
Private infrastructure
Internet
Which WAN technology is capable of transferring voice and video traffic by utilizing a fixed payload of 48 bytes for every frame?
Ethernet WAN
ISDN
ATM
Frame Relay
Which type of long distance telecommunication technology provides point-to-point connections and cellular access?
Mobile broadband
WiMax
Satellite
Municipal Wi-Fi
A small law firm wants to connect to the Internet at relatively high speed but with low cost. In addition, the firm prefers that the connection be through a dedicated link to the service provider. Which connection type should be selected?
Cable
ISDN
Leased line
DSL
Refer to the exhibit. What type of Layer 2 encapsulation will be used for connection D on the basis of this configuration on a newly installed router:
Frame Relay
HDLC
PPP
Ethernet
Which two protocols in combination should be used to establish a link with secure authentication between a Cisco and a non-Cisco router? (Choose two.)
CHAP
PAP
HDLC
PPP
SLIP
Which statement is true about NCP?
NCP tests the link to ensure that the link quality is sufficient.
Each network protocol has a corresponding NCP
Link termination is the responsibility of NCP.
NCP establishes the initial link between PPP devices.
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.
Create and configure the multilink interface.
Enable PPP encapsulation on the multilink interface.
Enable PPP encapsulation on the serial interfaces.
Assign the Fast Ethernet interface to the multilink bundle.
Bind the multilink bundle to the Fast Ethernet interface
A network engineer is troubleshooting the failure of CHAP authentication over a PPP WAN link between two routers. When CHAP authentication is not included as part of the interface configuration on both routers, communication across the link is successful. What could be causing CHAP to fail?
The clock rate has not been configured on the DCE serial interface.
The hostname configured on each router is different.
The username configured on each router matches the hostname of the other router.
The secret password configured on each router is different.
Which statement describes the difference between CHAP and PAP in PPP authentication?
PAP uses a two-way handshake method and CHAP uses a three-way handshake method.
PAP sends the password encrypted and CHAP does not send the password at all.
PAP and CHAP provide equivalent protection against replay attacks.
PAP sends the password once and CHAP sends the password repeatedly until acknowledgment of authentication is received.
A technician at a remote location is troubleshooting a router and has emailed partial debug command output to a network engineer at the central office. The message that is received by the engineer only contains a number of LCP messages that relate to a serial interface. Which WAN protocol is being used on the link?
PPP
VPN
HDLC
Frame Relay
Which DSL technology provides higher downstream bandwidth to the user than upstream bandwidth?
CDMA
SDSL
TDMA
ADSL
Which communication protocol allows the creation of a tunnel through the DSL connection between the customer router and the ISP router to send PPP frames?
POTS
CHAP
ADSL
PPPoE
Which group of APIs are used by an SDN controller to communicate with various applications?
Westbound APIs
Northbound APIs
Southbound APIs
Eastbound APIs
Which two technologies are core components of Cisco ACI architecture? (Choose two.)
OpenFlow enabled switches
Application Policy Infrastructure Controller
Transparent Interconnection of Lots of Links
Application Network Profile
Interface to the Routing System
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?
Site-to-site VPN
Cisco Secure Mobility Clientless SSL VPN
Cisco AnyConnect Secure Mobility Client with SSL
Remote access VPN using IPsec
When GRE is configured on a router, what do the tunnel source and tunnel destination addresses on the tunnel interface refer to?
The IP address of host on the LAN that is being extended virtually
The IP addresses at each end of the WAN link between the router
The IP addresses of the two LANs that are being connected together by the VPN
the IP addresses of tunnel interfaces on intermediate routers between the connected routers
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