October 23 2009
640-802 Dumps Questions 358 to 360
QUESTION 358
Router CM1 receives information about network 192.168.111.0/24 from multiple sources. What will CM1
consider the most reliable information about the path to that network?
A. An OSPF update for network 192.168.111.0/16
B. A static route to network 192168.1111.0/24
C. A Directly connected interface with an address of 192.168.1111.254/24
D. A RIP update for network 192.168.1111.0/24
E. A Default route with a next hop address of 192.168.1111.1
F. A static route to network 192.168.1111.0/24 with a local serial interface configured as the next hop
G. None of the above
Answer: C
Section: CONFIGURE, VERIFY, AND TROUBLESHOOT BASIC ROUTER OPERATION AND ROUTING ON
CISCO DEVICES
Explanation/Reference:
QUESTION 359
Router CM1 has just received a packet and needs to route it. What two actions must this router take in order to
route incoming packets? (Choose two)
A. Inspect the routing table to select the best path to the destination network addresses.
B. Validate sources of routing information.
C. Inspect the ARP table to verify a legitimate source MAC address for each packet.
D. Identify the destination network address of each packet.
E. Verify the receipt of routed packets by the next hop router.
F. Identify the source network address of each packet.
Answer: AD
Section: CONFIGURE, VERIFY, AND TROUBLESHOOT BASIC ROUTER OPERATION AND ROUTING ON
CISCO DEVICES
Explanation/Reference:
Explanation:
The router decides how to forward an incoming packet by finding the routes that “match” the destination
address of the packet, and then forwarding it according to the most narrowly applicable one. A packet matches
a route in the following way: a packet has (among other things) a destination address in its header, a route
contains either a network or a host address, a network mask (netmask), and instructions on how to forward a
packet using the route. The packet matches the route if its destination address is part of the address subspace
defined by the network address or exactly matches the host address of the route. A route is more narrowly
applicable than another if the address subspace defined by its network address contains fewer actual
addresses than the other, which is indicated by the netmask. An entry with a host address, rather than a
network address, is the narrowest kind.
QUESTION 360
Part of the Certifyme network is shown below:
In this network, host CertifymeA has established communications with host CertifymeB for the first time. What
enabled router Certifyme2 to forward this traffic in the appropriate direction to reach the network to which host
CertifymeB is attached?
A. A default gateway
B. TCP/IP
C. A routing protocol
D. DHCP
E. A Layer 4 protocol
F. DNS
G. None of the above
Answer: C
Section: CONFIGURE, VERIFY, AND TROUBLESHOOT BASIC ROUTER OPERATION AND ROUTING ON
CISCO DEVICES
Explanation/Reference:
Explanation:
Routing is the process of selecting paths in a network along which to send data or physical traffic. In order for
routers to know how to forward traffic to the correct destinations located on other IP networks, a routing
protocol must be enabled, either via the use of a dynamic routing protocol such as RIP or EIGRP, or through
the use of static routes.
Section 2: Describe the operation of Cisco routers (including:
router bootup process, POST, router components) (23 questions)



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