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2021 Oct JN0-643 question
Q51. -- Exhibit --
Mar 16 18:39:15.800390 BGP RECV 172.14.10.2+57785 -> 172.14.10.1+179
Mar 16 18:39:15.800932 BGP RECV message type 1 (Open) length 59
Mar 16 18:39:15.800995 BGP RECV version 4 as 2 holdtime 90 id 192.168.5.1 parmlen 30
Mar 16 18:39:15.801064 BGP RECV MP capability AFI=2, SAFI=1
Mar 16 18:39:15.801112 BGP RECV Refresh capability, code=128
Mar 16 18:39:15.801172 BGP RECV Refresh capability, code=2
Mar 16 18:39:15.801224 BGP RECV Restart capability, code=64, time=120, flags=
Mar 16 18:39:15.801289 BGP RECV 4 Byte AS-Path capability (65), as_num 2
Mar 16 18:39:15.801705 advertising receiving-speaker only capabilty to neighbor 172.14.10.2 (External AS 2)
Mar 16 18:39:15.801787 bgp_senD. sending 59 bytes to 172.14.10.2 (External AS 2)
Mar 16 18:39:15.801845
Mar 16 18:39:15.801845 BGP SEND 172.14.10.1+179 -> 172.14.10.2+57785
Mar 16 18:39:15.801933 BGP SEND message type 1 (Open) length 59
Mar 16 18:39:15.801991 BGP SEND version 4 as 1 holdtime 90 id 192.168.2.1 parmlen 30
Mar 16 18:39:15.802054 BGP SEND MP capability AFI=1, SAFI=1
Mar 16 18:39:15.802115 BGP SEND Refresh capability, code=128
Mar 16 18:39:15.802176 BGP SEND Refresh capability, code=2
Mar 16 18:39:15.802227 BGP SEND Restart capability, code=64, time=120, flags=
Mar 16 18:39:15.802292 BGP SEND 4 Byte AS-Path capability (65), as_num 1
Mar 16 18:39:15.802615 bgp_process_caps: mismatch NLRI with 172.14.10.2 (External AS 2):
peer: <inet6-unicast>(16) us: <inet-unicast>(1)
Mar 16 18:39:15.802763 bgp_process_caps:2561: NOTIFICATION sent to 172.14.10.2 (External AS 2): code 2 (Open Message Error) subcode 7 (unsupported capability) value 1
Mar 16 18:39:15.802913 bgp_senD. sending 23 bytes to 172.14.10.2 (External AS 2)
Mar 16 18:39:15.802969
Mar 16 18:39:15.802969 BGP SEND 172.14.10.1+179 -> 172.14.10.2+57785
Mar 16 18:39:15.803057 BGP SEND message type 3 (Notification) length 23
Mar 16 18:39:15.803113 BGP SEND Notification code 2 (Open Message Error) subcode 7 (unsupported capability)
Mar 16 18:39:15.803179 BGP SEND Data (2 bytes): 00 01
-- Exhibit --
Click the Exhibit button.
Looking at the traceoptions output in the exhibit, why is the BGP neighbor not in Established state?
A. BGP refresh is not supported.
B. There is a router ID mismatch.
C. IPv6 is not supported on the local peer.
D. The peer AS number is misconfigured.
Answer: C
Q52. -- Exhibit --[edit protocols ospf]
user@R2# show
area 0.0.0.6 {
nssa {
default-lsa default-metric 10;
area-range 184.23.12.0/24;
}
interface ge-1/1/4;
}
[edit protocols ospf]
user@R2# show ospf database
OSPF database, Area 0.0.0.0
Type ID Adv Rtr Seq Age Opt Cksum Len
Router *192.168.0.2 192.168.0.2 0x80000004 749 0x22 0x87c2 60
Router 192.168.0.3 192.168.0.3 0x80000004 399 0x22 0x94b5 60
Summary *10.0.0.0 192.168.0.2 0x80000003 19 0x22 0xe2e4 28
Summary *192.168.0.1 192.168.0.2 0x80000002 1100 0x22 0xbda7 28
OSPF database, Area 0.0.0.6
Type ID Adv Rtr Seq Age Opt Cksum Len
Router 192.168.0.1 192.168.0.1 0x80000004 404 0x20 0x76db 60
Router *192.168.0.2 192.168.0.2 0x80000003 1802 0x20 0x319b 48
Summary *11.0.0.0 192.168.0.2 0x80000002 2504 0x20 0xf5d3 28
Summary *192.168.0.2 192.168.0.2 0x80000003 2153 0x20 0xc5a0 28
Summary *192.168.0.3 192.168.0.2 0x80000002 398 0x20 0xc79d 28 NSSA *0.0.0.0 192.168.0.2 0x80000001 11 0x20 0xcbf1 36 NSSA 184.23.12.0 192.168.0.1 0x80000002 447 0x28 0xb93f 36
OSPF AS SCOPE link state database
Type ID Adv Rtr Seq Age Opt Cksum Len Extern *184.23.12.0 192.168.0.2 0x80000003 11 0x22 0x28d6 36 -- Exhibit --
Click the Exhibit button.
Referring to the exhibit, which two statements are correct? (Choose two.)
A. R2 injects a Type 3 LSA for 184.23.12.0/24 into the backbone.
B. R2 is an ABR.
C. R2 injects a Type 5 LSA for 184.23.12.0/24 into the backbone.
D. R2 is an ASBR.
Answer: B,C
Q53. -- Exhibit –
-- Exhibit --
Click the Exhibit button.
Referring to the exhibit, your AS is connected to ISP-A and ISP-B using BGP. R1 and R2 are advertising your AS's 172.25/16 prefix upstream to both ISPs, and both ISPs are providing a full BGP route table. You want to influence traffic flow so that traffic towards your network enters through R1.
Which action would meet the requirement?
Apply the following as an export policy towards ISP-B:
A. [edit policy-options]
user@R2# show
policy-statement prefer-for-inbound {
term prepend {
then {
as-path-prepend "100 100";
accept;
}
}
}
Apply the following as an export policy towards ISP-A:
B. [edit policy-options]
user@R1# show
policy-statement prefer-for-inbound {
term prepend {
then {
as-path-prepend "100 100";
accept;
}
}
}
Apply the following as an export policy towards R1 and R3:
C. [edit policy-options]
user@R2# show
policy-statement prefer-for-inbound {
term local-pref {
then {
local-preference 110;
accept;
}
}
}
Apply the following as an export policy towards R2 and R3:
D. [edit policy-options]
user@R1# show
policy-statement prefer-for-inbound {
term local-pref {
then {
local-preference 110;
accept;
}
}
}
Answer: A
Q54. Click the Exhibit button.
On AS1, which two attributes are used to influence inbound traffic from the other ASs shown in the exhibit? (Choose two.)
A. AS path
B. MED
C. local preference
D. origin
Answer: A,D
Q55. Click the Exhibit button.
You are asked to configure an OSPF virtual link that connects remote Area 4 to the backbone.
Referring to the exhibit, what are two requirements for an OSPF virtual link to operate correctly? (Choose two.)
A. A virtual link configuration on the ABR between Areas 0 and 1 must include transit area 1.
B. The interface of the transit area must be of type vt.
C. A virtual link configuration on the ABR between Areas 0 and 1 must be the interface address of the neighbor on the far end.
D. A virtual link configuration on the ABR between Areas 0 and 1 must be the router ID (RID) of the neighbor on the far end.
Answer: A,D
Rebirth JN0-643 latest exam:
Q56. You are asked to reconfigure a CoS scheduler to limit the assured forwarding queue to a maximum of 75 percent of the available bandwidth. The assured forwarding queue uses a strict high priority queue.
Which configuration parameter accomplishes this task?
A. transmit-rate percent 75
B. buffer-size percent 75
C. shaping-rate percent 75
D. shared-buffer percent 75
Answer: C
Q57. -- Exhibit --
{master:0}[edit]
user@switch# show protocols vstp
vlan 100;
{master:0}[edit]
user@switch# run show spanning-tree bridge
STP bridge parameters
Context ID : 1
Enabled protocol : RSTP
STP bridge parameters for VLAN 100
Root ID : 32868.50:c5:8d:ae:94:80
Hello time : 2 seconds
Maximum age : 20 seconds
Forward delay : 15 seconds
Message age : 0
Number of topology changes : 0
Local parameters
Bridge ID : 32868.50:c5:8d:ae:94:80
Extended system ID : 1
Internal instance ID : 0
{master:0}[edit]
user@switch# run show spanning-tree interface
{master:0}[edit]
user@switch#
-- Exhibit --
Click the Exhibit button.
Based on the output shown in the exhibit, why is VSTP not working for VLAN 100?
A. No interfaces are assigned to VLAN 100.
B. Your MSTI is misconfigured.
C. RSTP is configured in addition to VSTP.
D. No native VLAN is configured.
Answer: A
Q58. Click the Exhibit button.
In the exhibit, an EBGP session is currently established between R1 and R2. R2 changes its import policy to accept 10 of the routes it previously denied from R1.
Which BGP capability must be negotiated on the BGP session for R2 to install the routes accepted by the new policy?
A. route refresh
B. AddPath
C. outbound route filtering (ORF)
D. multiprotocol BGP (MBGP)
Answer: A
Q59. Which statement is true about default BGP route redistribution behavior?
A. IBGP-learned routes are advertised only to other IBGP peers.
B. EBGP-learned routes are redistributed into any IGPs.
C. EBGP-learned routes are advertised only to other EBGP peers.
D. EBGP-learned routes are advertised to other IBGP and EBGP peers.
Answer: D
Q60. Click the Exhibit button.
Referring to the exhibit, the RPT from R3 towards R2 is established.
What happens if the multicast source connected to R1 starts sending multicast traffic towards R1?
A. R1 encapsulates the multicast packets into a PIM register multicast packet.
B. R1 encapsulates the multicast packets into PIM join unicast messages.
C. R1 forwards the multicast packets on the (S,G) tree towards the RP.
D. R1 tunnels the multicast packets in PIM register messages towards the RP.
Answer: D