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試験番号：300-080
試験科目：「Troubleshooting Cisco IP Telephony & Video v1.0」
一年間無料で問題集をアップデートするサービスを提供いたします
最近更新時間：2018-08-05
問題と解答：全220問 300-080 全真模擬試験
試験番号：200-105
試験科目：「Interconnecting Cisco Networking Devices Part 2 (ICND2 v3.0)」
一年間無料で問題集をアップデートするサービスを提供いたします
最近更新時間：2018-08-05
問題と解答：全268問 200-105 試験参考書
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NEW QUESTION: 1
At which layer of the OSI model is RSTP used to prevent loops?
A. network
B. physical
C. data link
D. transport
Answer: C
200-105 無料 200-105 対策書
Explanation: RSTP and STP operate on switches and are based on the exchange of
Bridge Protocol Data Units (BPDUs) between switches. One of the most important fields in
BPDUs is the Bridge Priority in which the MAC address is used to elect the Root Bridge ,
RSTP operates at Layer 2.
http://www.cisco.com/en/US/tech/tk389/tk621/technologies_white_paper09186a0080094cfa.shtml
NEW QUESTION: 2
Which parameter would you tune to affect the selection of a static route as a backup, when a
dynamic protocol is also being used?
A. link delay
B. hop count
C. link cost
D. administrative distance
E. link bandwidth
Answer: D
Explanation:
What Is Administrative Distance?
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094195.shtml
Administrative distance is the feature that routers use in order to select the best path.
Administrative distance defines the reliability of a routing protocol. Each routing protocol is
prioritized in order of most to least reliable (believable) with the help of an administrative distance
value. Lowest Administrative distance will be chosen first.
NEW QUESTION: 3
Which two are advantages of static routing when compared to dynamic routing? (Choose
two.)
A. An efficient algorithm is used to build routing tables, using automatic updates.
B. Routing traffic load is reduced when used in stub network links.
C. Routing tables adapt automatically to topology changes.
D. Routing updates are automatically sent to neighbors.
E. Security increases because only the network administrator may change the routing table.
F. Route summarization is computed automatically by the router.
G. Configuration complexity decreases as network size increases.
Answer: B,E
200-105 ブロンズ 200-105 過去
Explanation:
When reading (or being lectured about) all the glorious details of dynamic routing protocols, it's hard
not to come away with the impression that dynamic routing is always better than static routing. It's
important to keep in mind that the primary duty of a dynamic routing protocol is to automatically
detect and adapt to topological changes in the internetwork.
The price of this "automation" is paid in bandwidth, security, and maybe queue space, in memory,
and in processing time.
A frequent objection to static routing is that it is hard to administer. This criticism may be true of
medium to large topologies with many alternative routes, but it is certainly not true of small
internetworks with few or no alternative routes.
References:
http://www.ciscopress.com/articles/article.asp?p=24090&seqNum=6
http://www.ciscopress.com/articles/article.asp?p=24090
NEW QUESTION: 4
What information does a router running a link-state protocol use to build and maintain its
topological database? (Choose two.)
A. TTL packets from designated routers
B. hello packets
C. SAP messages sent by other routers
D. routing tables received from other link-state routers
E. LSAs from other routers
F. beacons received on point-to-point links
Answer: B,E
200-105 教材
Explanation:
Link State Routing Protocols
http://www.ciscopress.com/articles/article.asp?p=24090&seqNum=4
Link state protocols, sometimes called shortest path first or distributed database protocols, are built
around a well-known algorithm from graph theory, E. W. Dijkstra'a shortest path algorithm. Examples
of link state routing protocols are:
Open Shortest Path First (OSPF) for IP
The ISO's Intermediate System to Intermediate System (IS-IS) for CLNS and IP
DEC's DNA Phase V
Novell's NetWare Link Services Protocol (NLSP)
Although link state protocols are rightly considered more complex than distance vector protocols, the
basic functionality is not complex at all:
1 . Each router establishes a relationship-an adjacency-with each of its neighbors.
2 . Each router sends link state advertisements (LSAs), some
3 . Each router stores a copy of all the LSAs it has seen in a database. If all works well, the databases
in all routers should be identical.
4 . The completed topological database, also called the link state database, describes a graph of the
internetwork. Using the Dijkstra algorithm, each router calculates the shortest path to each network
and enters this information into the route table.