WAN Flashcards
Question 1 Which command can you enter to determine whether serial interface 0/2/0 has been configured using HDLC encapsulation? A. router#show platform B. router#show ip interface s0/2/0 C. router#show interfaces Serial 0/2/0 D. router#show ip interface brief
Answer: C
Question 2 Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has built-in security mechanisms? A. X.25 B. HDLC C. PPP D. Frame Relay
Answer: C
Question 3
Which statements about using leased lines for your WAN infrastructure are true?
A. Leased lines provide inexpensive WAN access.
B. Leased lines with sufficient bandwidth can avoid latency between endpoints.
C. Leased lines require little installation and maintenance expertise.
D. Leased lines provide highly flexible bandwidth scaling.
E. Multiple leased lines can share a router interface.
F. Leased lines support up to T1 link speeds.
Answer: B C
Question 4
Two routers named Atlanta and Brevard are connected by their serial interfaces as illustrated, but there is no connectivity between them. The Atlanta router is known to have a correct configuration. Given the partial configurations, identify the problem on the Brevard router that is causing the lack of connectivity.
A. transmission unit size too large
B. no loopback set
C. an incorrect subnet mask
D. incompatible encapsulation at each end
E. an incorrect IP address F. incompatible bandwidth between routers
Answer: E
Question 5
Which of the following describes the roles of devices in a WAN? (Choose three)
A. A CSU/DSU terminates a digital local loop
B. A modem terminates a digital local loop
C. A CSU/DSU terminates an analog local loop
D. A modem terminates an analog local loop
E. A router is commonly considered a DTE device
F. A router is commonly considered a DCE device
Answers: A D E
Question 6
Which two pieces of information are provided by the “show controllers serial 0” command? (Choose two)
A. the type of cable that is connected to the interface.
B. The uptime of the interface
C. the status of the physical layer of the interface
D. the full configuration of the interface
E. the interface‟s duplex settings
Answer: A C
Question 7 Which command is used to know the duplex speed of serial link? A. show line B. show interface C. show protocol D. show run
Answer: B
Question 8 Which WAN topology provides a direct connection from each site to all other sites on the network? A. single-homed B. full mesh C. point-to-point D. hub-and-spoke
Answer: B
Question 9 What are three reasons that an organization with multiple branch offices and roaming users might implement a Cisco VPN solution instead of point-to-point WAN links? (Choose three) A. reduced cost B. better throughput C. broadband incompatibility D. increased security E. scalability F. reduced latency
Answer: A D E
Question 10
Which three statements about DWDM are true? (Choose three)
A. It allows a single strand of fiber to support bidirectional communications
B. It is used for long-distance and submarine cable systems
C. It can multiplex up to 256 channels on a single fiber
D. It supports both the SDH and SONET standards
E. Each channel can carry up to a 1-Gbps signal F. It supports simplex communications over multiple strands of fiber
Answer: A B D
Question 11 Which PPP subprotocol negotiates authentication options? A. NCP B. ISDN C. SUP D. LCP E. DLCI
Answer: D
In GLBP, which router will respond to client ARP requests?
A. The active virtual gateway will reply with one of four possible virtual MAC addresses.
B. All GLBP member routers will reply in round-robin fashion.
C. The active virtual gateway will reply with its own hardware MAC address.
D. The GLBP member routers will reply with one of four possible burned in hardware addresses.
Correct Answer: A Section: WAN Technologies
Which statement describes VRRP object tracking?
A. It monitors traffic flow and link utilization.
B. It ensures the best VRRP router is the virtual router master for the group.
C. It causes traffic to dynamically move to higher bandwidth links.
D. It thwarts man-in-the-middle attacks.
Hide Answer
Correct Answer: B Section: WAN Technologies
What OSPF command, when configured, will include all interfaces into area 0?
A. network 0.0.0.0 255.255.255.255 area 0
B. network 0.0.0.0 0.0.0.0 area 0
C. network 255.255.255.255 0.0.0.0 area 0
D. network all-interfaces area 0
Hide Answer
Correct Answer: A Section: WAN Technologies
QUESTION 55
Which statement describes the process ID that is used to run OSPF on a router?
A. It is globally significant and is used to represent the AS number.
B. It is locally significant and is used to identify an instance of the OSPF database.
C. It is globally significant and is used to identify OSPF stub areas.
D. It is locally significant and must be the same throughout an area.
Hide Answer
Correct Answer: B Section: WAN Technologies