QUESTION 291
Which two features are supported when Cisco HDLC is implemented? (Choose two.)
|
A. |
error recovery |
|
B. |
error detection |
|
C. |
asynchronous links |
|
D. |
multiple protocols |
Correct Answer: BD
Explanation:
HDLC’s frame check sequence (FCS) is a 16-bit CRC-CCITT or a 32-bit CRC-32 computed over the Address, Control, and Information fields. It provides a means by which the receiver can detect errors that may have been induced during the transmission of the frame, such as lost bits, flipped bits, and extraneous bits.
Cisco’s HDLC contains a proprietary field that is used to support multiple protocols.
Reference: http://en.wikipedia.org/wiki/High-Level_Data_Link_Control
QUESTION 292
Refer to the exhibit. You must complete the configuration on R1 so that a maximum of three links can be used and fragmentation is supported. Which additional configuration accomplishes this task?
|
A. |
interface Multilink19 ip address 192.168.1.1 255.255.255.0 ppp multilink ppp multilink group 19 ppp multilink links minimum 1 ppp multilink links maximum 3 ppp multilink interleave |
|
B. |
interface Multilink19 ip address 192.168.1.1 255.255.255.0 ppp multilink ppp multilink group 19 ppp multilink links maximum 3 ppp multilink fragment delay 20 |
|
C. |
interface Multilink19 ip address 192.168.1.1 255.255.255.0 ppp multilink ppp multilink group 19 ppp multilink links maximum 3 ppp multilink fragment delay 20 ppp multilink interleave |
|
D. |
interface Multilink19 ip address 192.168.1.1 255.255.255.252 ppp multilink ppp multilink group 19 ppp multilink links maximum 3 ppp multilink interleave |
Correct Answer: A
Explanation:
The “ppp multilink interleave” command is needed to enable link fragmentation and Interleaving (LFI). The Cisco IOS Link Fragmentation and Interleaving (LFI) feature uses Multilink PPP (MLP). MLP provides a method of splitting, recombining, and sequencing datagrams across multiple logical data links. MLP allows packets to be fragmented and the fragments to be sent at the same time over multiple point-to-point links to the same remote address.
ppp multilink links maximum
To limit the maximum number of links that Multilink PPP (MLP) can dial for dynamic allocation, use the ppp multilink links maximum command in interface configuration mode.
Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_2/qos/configuration/guide/fqos_c/qcflfi.html
QUESTION 293
Which statement is true about LLDP?
|
A. |
LLDP provides VTP support. |
|
B. |
LLDP does not use a multicast address to communicate. |
|
C. |
LLDP can indicate only the duplex setting of a link, and not the speed capabilities. |
|
D. |
LLDP does not support native VLAN indication. |
Correct Answer: D
Explanation:
Cisco Discovery Protocol Versus LLDP-MED TLV Comparison
TLV Function
LLDP TLV
Cisco Discovery Protocol TLV
Native VLAN support-Indicates the native VLAN
No
Native VLAN TLV
Reference:
http://www.cisco.com/en/US/technologies/tk652/tk701/technologies_white_paper0900aecd804cd4 6d.html
QUESTION 294
Refer to the exhibit. What will be the IP MTU of tunnel 0?
|
A. |
1500 |
|
B. |
1524 |
|
C. |
1476 |
|
D. |
1452 |
|
E. |
1548 |
Correct Answer: C
Explanation:
In the case of the GRE tunnel interface, the IP maximum transmission unit (MTU) is 24 bytes less than the IP MTU of the real outgoing interface. For an Ethernet outgoing interface that means the IP MTU on the tunnel interface would be 1500 minus 24, or 1476 bytes.
Reference: http://www.cisco.com/c/en/us/support/docs/ip/generic-routing-encapsulation-gre/13725-56.html
QUESTION 295
Which technology facilitates neighbor IP address resolution in DMVPN?
|
A. |
CEF |
|
B. |
mGRE |
|
C. |
a dynamic routing protocol |
|
D. |
NHRP |
Correct Answer: D
Explanation:
NHRP Used with a DMVPN
NHRP is used to facilitate building a VPN and provides address resolution in DMVPN. In this context, a VPN consists of a virtual Layer 3 network that is built on top of an actual Layer 3 network. The topology you use over the VPN is largely independent of the underlying network, and the protocols you run over it are completely independent of it. The VPN network (DMVPN) is based on GRE IP logical tunnels that can be protected by adding in IPsec to encrypt the GRE IP tunnels.
Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_4/ip_addr/configuration/guide/hadnhrp.html#wp1057255
QUESTION 296
DRAG DROP
Correct Answer:
QUESTION 297
Refer to the exhibit. Which action must you take to enable full reachability from router C to router D?
|
A. |
Build an OSPF virtual link. |
|
B. |
Build an OSPF sham link. |
|
C. |
Configure mutual redistribution between OSPF and EIGRP on routers A and B. |
|
D. |
Add a static route on router D. |
Correct Answer: C
Explanation:
For full connectivity, we need to configure mutual redistribution to advertise the EIGRP routes into OSPF and to advertise the OSPF routes into the EIGRP network. This needs to be done at the two border routers that connect to both the EIGRP and OSPF domains.
QUESTION 298
DRAG DROP
Correct Answer:
QUESTION 299
Which two options are required parts of an EEM policy? (Choose two.)
|
A. |
event register keyword |
|
B. |
body |
|
C. |
environment must defines |
|
D. |
namespace import |
|
E. |
entry status |
|
F. |
exit status |
Correct Answer: AB
Explanation:
EEM policies require two parts: the event register keyword and the body. The remaining parts of the policy are optional: environment must defines, namespace import, entry status, and exit status (Figure 5).
Figure 5. EEM Policy Parts
Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ios-embedded-event-manager-eem/config_guide_eem_configuration_for_cisco_integrated_services_router_platforms.html
QUESTION 300
Which regular expression will match prefixes that originated from AS200?
|
A. |
^$ |
|
B. |
^200_ |
|
C. |
_200$ |
|
D. |
^200) |
|
E. |
_200_ |
Correct Answer: C
Explanation:
Example on how to deny all prefixes originated in Autonomous System 200
router bgp 100
neighbor 10.1.1.1 remote-as 65535
neighbor 10.1.1.1 route-map map1 in
!
route-map map1 permit 10
match as-path 1
!
ip as-path access-list 5 deny _200$
ip as-path access-list 5 permit .*
Reference: http://www.cisco.com/c/en/us/td/docs/ios/termserv/configuration/guide/12_4t/tsv_12_4t_book/tsv_r eg_express.html
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