Braindumps of 642-811
Building Cisco® Multilayer Switched Networks
Questions, Answers, Braindumps (642-811)
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In the Enterprise Composite Network Model; what are
three of the functional areas? (Choose three)
A. Enterprise Campus
B. Enterprise Edge
C. Service Provider Edge
D. Building Access
E. Server Farm
F. Campus Backbone
Answer: A, B, C
A, B, C as it is for the enterprise composite network
model not enterprise campus.
Which of the protocols below happen to be very closely
related standards? (Choose two.)
Answer: C, E
SDH and Sonet are both optical-based physical layer
protocols one ITU and the other ANSI. SDH is the
European standard while Sonet is an American standard
B: ATM is a cell-based layer two protocol.
Synchronous Digital Hierarchy. The European standard
that defines a rate and format for transmission of
optical signals over fiber using ATM and SONET. In
contrast to PDH, SDH provides for a synchronous
Which statement correctly describes the extended system
A. It is the 2-bit number of the MSTP instance.
B. It is the VLAN identifier value and allows for 4096
BIDs to be uniquely identified.
C. It is the bridge MAC address which is allocated from
a pool of MAC addresses that are factory assigned.
D. It is a hex number used to measure the pReference of
a bridge in the spanning-tree algorithm.
According to Cisco white paper:Extended System ID
A 12-bit extended system ID field is part of the bridge
ID. Chassis that support only 64 MAC addresses always
use the 12-bit extended system ID. On chassis that
support 1024 MAC addresses, you can enable use of the
extended system ID. STP uses the VLAN ID as the extended
system ID. See the "Enabling the Extended System ID"
You are a CCNP in the midst of completing a switching
solution. You are contemplating the use of UTP cable.
What is the maximum distance in metres (between the
punch block and the switch) that you can use?
C. None of the choices.
According to Cisco: The maximum length for an unshielded
twisted pair (UTP) cable segment is 100 meters. The
maximum length for a fiber cable is 2 km. According to
webopedia.com: UTP - Short for Unshielded Twisted Pair,
a popular type of cable that consists of two unshielded
wires twisted around each other. Due to its low cost,
UTP cabling is used extensively for local-area networks
(LANs) and telephone connections. UTP cabling does not
offer as high bandwidth or as good protection from
interference as coaxial or fiber optic cables, but it is
less expensive and easier to work with.
What kind of cable should you use to connect a router,
server, or individual workstation to a switch?
A. rollover cable
B. crossover cable
C. straight cable
D. coax cable
To connect to a switch you have to use a straight cable.
A rollover cable is used to connect to the console port
of a switch or a router. Crossover cables are used to
connect: two computers, two hubs, a hub to a switch, a
cable modem to a router, or two router interfaces
Which of the following cable types are appropriate for
Gigabit Ethernet applications? (Select two)
A. Cat-3 UTP
B. Cat-5 UTP
C. RG-58 coax
D. 50 micron MMF
E. 62.5 micron SMF
Answer: B, D
Gigabit Ethernet Cabling and Distance Limitations
1000BASE-T EIA/TIA Category 5 UTP 4 100 m 1000BASE-SX
Multimode fiber (MMF) with 62.5 micron core;850 nm laser
1 275 m
MMF with 50 micron core; 850 nm laser 1 550 m
1000BASE-LX/LH MMF with 62.5 micron core; 1300 nm laser
1 550 m
Single-mode fiber (SMF) with 50 micron core;
1300 nm laser 1 550 m
B: 1000BaseT use category 5 UTP.
D: 1000BaseSX use 62.5 and 50-micron MMF
By what means could you provide a Layer 3 data path
between two separate VLANs? (Choose two)
A. A VLAN trunking
B. An external router
C. An internal processor
D. VLAN capable bridge
Answer: B, C