OSPF-BGP-IPv6-QoS Lab Sim

Question

Refer to the exhibit

Note: I haven’t had enough information to answer these questions, but below are answers and explanations from candidates who took the exam and shared their experience (thanks Sanjana Chopra & DBurger for sharing this).

Question 1

Which type of the LSA will be added in the OSPF broadcast network type?

A. LSA1
B. LSA2
C. LSA3
D. LSA5
E. LSA7

 

Answer: B

Question 2

Which one is the Designated Router router ID?

A. 7.7.1.1
B. 7.7.5.5
C. 7.7.S.6
D. 22.22.2.2
E. 7.7.2.2

 

Answer: E

Command to answer this question: “show ip ospf database” where there is an LSA type 2 in a broadcast network type ospf.

Explanation

7.7.2.2 is the designated router router ID

—————————————————————————–
For Example :

RouterA# show ip ospf database

OSPF Router with id(192.168.239.66) (Process ID 300)

Displaying Router Link States(Area 0.0.0.0)

Link ID ADV Router Age Seq# Checksum Link count

172.16.21.6 172.16.21.6 1731 0x80002CFB 0x69BC 8

172.16.21.5 172.16.21.5 1112 0x800009D2 0xA2B8 5

172.16.1.2 172.16.1.2 1662 0x80000A98 0x4CB6 9

172.16.1.1 172.16.1.1 1115 0x800009B6 0x5F2C 1

172.16.1.5 172.16.1.5 1691 0x80002BC 0x2A1A 5

172.16.65.6 172.16.65.6 1395 0×80001947 0xEEE1 4

172.16.241.5 172.16.241.5 1161 0x8000007C 0x7C70 1

172.16.27.6 172.16.27.6 1723 0×80000548 0×8641 4

172.16.70.6 172.16.70.6 1485 0x80000B97 0xEB84 6

Displaying Net Link States(Area 0.0.0.0)

Link ID ADV Router Age Seq# Checksum

172.16.1.3 192.168.239.66 1245 0x800000EC 0x82E

Displaying Summary Net Link States(Area 0.0.0.0)

Link ID ADV Router Age Seq# Checksum

172.16.240.0 172.16.241.5 1152 0×80000077 0x7A05

172.16.241.0 172.16.241.5 1152 0×80000070 0xAEB7

172.16.244.0 172.16.241.5 1152 0×80000071 0x95CB

This case 192.168.239.66 is the Designated Router RouterID (where there is an lsa type 2 in a broadcast network type ospf. )

Exam Answer is “7.7.2.2 is the designated router router ID”.

Question 3

IPV6 multicast over the LAN link between R1/R2 two routers. Which statement is true?

A. IPv6 multicast group with the first octet in every route, the RP use sparse mode.
B. IPv6 multicast group with the first octet in every route, the RP use Dense mode.
C. IPv6 multicast group with the first octet in every route, the RP use sparse-dense mode.
D. Composed of (*, G) and (S, G) entries,the multicast distribution trees as understood by the router at this point in the network.

 

Answer: A

Command to answer this question “show ipv6 mroute”.

Explanation

R2#show ipv6 mroute

Multicast Routing Table
Flags: D – Dense, S – Sparse, B – Bidir Group, s – SSM Group,
C – Connected, L – Local, I – Received Source Specific Host Report,
P – Pruned, R – RP-bit set, F – Register flag, T – SPT-bit set,
J – Join SPT
Timers: Uptime/Expires
Interface state: Interface, State

(*, FF08:AAAA::1), 00:04:05/00:03:25, RP 2002:2222::2, flags: SP
Incoming interface: Tunnel2
RPF nbr: 2002:2222::2
Immediate Outgoing interface list:
FastEthernet0/0, Forward, 00:04:05/00:03:25

There is an multicast groups that has joined the router.

The answers are:

The option with the multicast group with the first octet in every route. This case (FF08) check whatever your output (*,G entry) and flag ,Flag = SP ,The RP use sparse mode.

Question 4

Between R3-R1-R2 all interfaces running EIGRPv6, why R3-loopback cannot reach R1-loopback?

A. R1 and R3 EIGRP v6 AS no mismatch.
B. R1 and R2 EIGRP v6 K1 K2 K3 K4 K5 no mismatch.
C. R1 and R3 ipv6 eigrp as-number”, no configure interface mode ”no shutdown”.
D. R1 and R3 authentication no mismatch.

 

Answer: C

Question 5

Look at the configuration in R3. Of the following routes (30.30.0.0/16,40.40.0.0/16, and 200.200.0.0/16), which ones will show up in R2?

A. 40.40.0.0/16 and 200.200.0.0/16 will show up to R2.
B. 30.30.0.0/16 and 200.200.0.0/16 will show up to R2.
C. 30.30.0.0/16 and 40.40.0.0/16 will show up to R2.
D. 30.30.0.0/16, 40.40.0.0/16 and 40.40.0.0/16 will show up to R2.

 

Answer: A

Explanation

Relevant R3 config is the following:
router BGP 1000
neighbor {R2 Loop IP address} remote-as 10
neighbor {R2 Loop IP address} route-map BGP out
neighbor {R2 Loop IP address} send community

route-map 5 BGP permit
match ip address 1
set community no export
route-map 10 BGP permit

access-list 1 30.0.0.0 0.255.255.255

Answer – 40.40.0.0/16 and 200.200.0.0/16 will show up. 30.30.0.0 will not be sent to R2 because it is now in the community of ‘no export’

Question 6

Which statements are true about the following policy map?

A. Packets between 200 and 1000 bytes will be marked with prec 2.
B. Packets less that 488 will be marked with ip prec 2.
C. Packets more that 500 will be marked with ip prec 2.
D. Packets with size that 200 will be marked with ip prec 2.

 

Answer: D (may have more than one answer)

Explanation

R1#show service-policy Gig1/0

Class Somename1 Match-All
ip dscp 40
match packets size 200 min 1000 max
NO match packets size min 500 max 500
Set IP Prec 2

Class Somename1 Match-All
match packets size 500 min 500 max
Set IP Prec 1

Class default match any

Answer…I forget the answers (there were 6 to choose from) but I believe I chose the ones that stated the following:
1.) packets between 200 and 1000 bytes will be marked with prec 2
2.) packets less that 488 will be marked with ip prec 2
3.) I forget what I put for this one.