CCNA 4 exam
Which public WAN technology provides security by using encrypted tunnels over Internet
connections?
3G/4G
DSL
VPN
cable - ANSWERSVPN
A construction firm is building a power plant at a remote and isolated mine site and needs to
connect the data network of the plant to the corporate network. Which public technology is the
most suitable to meet the connection needs?
WiMax
Municipal Wi-Fi
DSL
,satellite Internet - ANSWERSsatellite Internet
Which two WAN infrastructure services are examples of private connections? (Choose two.)
DSL
cable
Frame Relay
wireless
T1/E1 - ANSWERSFrame Relay, T1/E1
What is a characteristic of a WAN?
A WAN operates inside the geographic scope of a LAN.
WAN service providers include carriers such as a telephone network or satellite service.
A WAN is typically owned by an enterprise which wants to interconnect its LANs.
WANs always use physical cables to connect LANs. - ANSWERSWAN service providers include
carriers such as a telephone network or satellite service.
Which statement correctly describes a WAN technology?
,The 53-byte ATM cell operates more efficiently for big frames.
VSATs create a public WAN while providing connectivity to remote locations
MPLS can be used to deliver any type of packet between sites.
ISDN PRI is intended for the home and small enterprise and provides two 64 kb/s B channels
and a 16 kb/s D channel. - ANSWERSMPLS can be used to deliver any type of packet between
sites.
Which medium do service providers use to transmit data over WAN connections with SONET,
SDH, and DWDM?
copper
Wi-Fi
fiber optic
satellite - ANSWERSfiber optic
Which two technologies are categorized as private WAN infrastructures? (Choose two.)
DSL
VPN
, cable
MetroE
Frame Relay - ANSWERSMetroE
Frame Relay
Which two devices are needed when a digital leased line is used to provide a connection
between the customer and the service provider? (Choose two.)
access server
CSU
Layer 2 switch
DSU
dialup modem - ANSWERSCSU, DSU
What is an advantage of packet-switched technology over circuit-switched technology?
Packet-switched networks are less susceptible to jitter than circuit-switched networks are
Packet-switched networks can efficiently use multiple routes inside a service provider network
Packet-switched networks do not require an expensive permanent connection to each
endpoint.
Packet-switched networks usually experience lower latency than circuit-switched networks
experience - ANSWERSPacket-switched networks can efficiently use multiple routes inside a
service provider network
A company needs to interconnect several branch offices across a metropolitan area. The
network engineer is seeking a solution that provides high-speed converged traffic, including
voice, video, and data on the same network infrastructure. The company also wants easy
Which public WAN technology provides security by using encrypted tunnels over Internet
connections?
3G/4G
DSL
VPN
cable - ANSWERSVPN
A construction firm is building a power plant at a remote and isolated mine site and needs to
connect the data network of the plant to the corporate network. Which public technology is the
most suitable to meet the connection needs?
WiMax
Municipal Wi-Fi
DSL
,satellite Internet - ANSWERSsatellite Internet
Which two WAN infrastructure services are examples of private connections? (Choose two.)
DSL
cable
Frame Relay
wireless
T1/E1 - ANSWERSFrame Relay, T1/E1
What is a characteristic of a WAN?
A WAN operates inside the geographic scope of a LAN.
WAN service providers include carriers such as a telephone network or satellite service.
A WAN is typically owned by an enterprise which wants to interconnect its LANs.
WANs always use physical cables to connect LANs. - ANSWERSWAN service providers include
carriers such as a telephone network or satellite service.
Which statement correctly describes a WAN technology?
,The 53-byte ATM cell operates more efficiently for big frames.
VSATs create a public WAN while providing connectivity to remote locations
MPLS can be used to deliver any type of packet between sites.
ISDN PRI is intended for the home and small enterprise and provides two 64 kb/s B channels
and a 16 kb/s D channel. - ANSWERSMPLS can be used to deliver any type of packet between
sites.
Which medium do service providers use to transmit data over WAN connections with SONET,
SDH, and DWDM?
copper
Wi-Fi
fiber optic
satellite - ANSWERSfiber optic
Which two technologies are categorized as private WAN infrastructures? (Choose two.)
DSL
VPN
, cable
MetroE
Frame Relay - ANSWERSMetroE
Frame Relay
Which two devices are needed when a digital leased line is used to provide a connection
between the customer and the service provider? (Choose two.)
access server
CSU
Layer 2 switch
DSU
dialup modem - ANSWERSCSU, DSU
What is an advantage of packet-switched technology over circuit-switched technology?
Packet-switched networks are less susceptible to jitter than circuit-switched networks are
Packet-switched networks can efficiently use multiple routes inside a service provider network
Packet-switched networks do not require an expensive permanent connection to each
endpoint.
Packet-switched networks usually experience lower latency than circuit-switched networks
experience - ANSWERSPacket-switched networks can efficiently use multiple routes inside a
service provider network
A company needs to interconnect several branch offices across a metropolitan area. The
network engineer is seeking a solution that provides high-speed converged traffic, including
voice, video, and data on the same network infrastructure. The company also wants easy
