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Exam Code: 200-105Exam Name: Interconnecting Cisco Networking Devices Part 2 (ICND2 v3.0)
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200-105 Test Answers Total Q&A: 110 Questions and Answers
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Exam Code: 200-120Exam Name: CCNA Cisco Certified Network Associate CCNA (803)
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200-120 Practice Exam Total Q&A: 364 Questions and Answers
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Exam Code: 400-201Exam Name: CCIE Service Provider Written Exam
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400-201 PDF VCE Total Q&A: 200 Questions and Answers
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NO.1 Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits
and has built-in security mechanisms?
A. HDLC
B. PPP
C. X.25
D. Frame Relay
Answer: B
200-105 Dumps PDF
Explanation:
High-Level Data Link Control (HDLC) - HDLC is the default encapsulation type on point-topoint,
dedicated links, and circuit-switched connections. It is used typically when communicating between
two Cisco devices. It is a bit-oriented synchronous data link layer protocol. Point-to-Point Protocol
(PPP) - Provides router-to-router and host-to network connections over synchronous and
asynchronous circuits. PPP was designed to work with several network layer protocols, such as IP,
and IPX. PPP also has built in security mechanisms such as PAP and CHAP X.25/Link Access Procedure,
Balanced (LAPB) - ITU-T standard that defines how connections between DTE and DCE are maintained
for remote terminal access and computer communications in public data networks. X.25 specifies
LAPB, a data line layer protocol. X.25 is a predecessor to Frame Relay. Frame Relay - Industry
standard, switched data link layer protocol that handles multiple virtual circuits. It is a next-
generation to X.25 that is streamlined to eliminate some of the time-consuming processes (such as
error correction and flow control) that were employed in X.25.
NO.2 Which parameter or parameters are used to calculate OSPF cost in Cisco routers?
A. Bandwidth, Delay, and MTU
B. Bandwidth
C. Bandwidth and Delay
D. Bandwidth, MTU, Reliability, Delay, and Load
Answer: B
200-105 Practice Questions
Explanation:
http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080094e9e.sht ml#t6
OSPF Cost
The cost (also called metric) of an interface in OSPF is an indication of the overhead required to send
packets across a certain interface. The cost of an interface is inversely proportional to the bandwidth
of that interface. A higher bandwidth indicates a lower cost.
There is more overhead (higher cost) and time delays involved in crossing a 56k serial line than
crossing a 10M Ethernet line. The formula used to calculate the cost is: Cost= 10000 0000/bandwidth
in bps
For example, it will cost 10 EXP8/10 EXP7 = 10 to cross a 10M Ethernet line and will cost 10
EXP8/1544000 =64 to cross a T1 line. By default, the cost of an interface is calculated based on the
bandwidth; you can force the cost of an interface with the ip ospf cost <value> interface sub
configuration mode command.