quiz – تعلم الشبكات

1. Which two GRE features are configured to prevent fragmentation? (Choose two)

A.PMTUD

B.DF bit Clear

C.TCP MSS

D.MTU ignore

E.IP MTU

F.TCP window size

Question 1 of 10

2. Which TCP setting is tuned to minimize the risk of fragmentation on a GRE/IP tunnel?

A.MTU

B.MRU

C.MSS

D.Window size

Question 2 of 10

3. Refer to exhibit.

MTU has been configured on the underlying physical topology, and no MTU command has been configured on the tunnel interfaces. What happens when a 1500-byte IPv4 packet traverses the GRE tunnel from host X to host Y, assuming the DF bit is cleared?

A.The packet arrives on router C without fragmentation.

B.The packet is discarded on router A

C.The packet arrives on router C fragmented.

D.The packet is discarded on router B

Question 3 of 10

4. Which statement about dynamic GRE between a headend router and a remote router is true?

A.GRE tunnels can be established when the remote router has a dynamic IP address

B.A GRE tunnel without an IP address has a status of administratively down

C.The remote router initiates the tunnel connection

D.The headend router learns the IP address of the remote end router statically

Question 4 of 10

5. A GRE tunnel is down with the error message %TUN-5-RECUR DOWN:

Tunnel0 temporarily disabled due to recursive routing error.

Which two options describe possible causes of the error? (Choose two)

A.The tunnel mode and tunnel IP address are misconfigured

B.There is instability in the network due to route flapping

C.There is link flapping on the tunnel

D.Incorrect destination IP addresses are configured on the tunnel

E.The tunnel destination is being routed out of the tunnel interface

Question 5 of 10

6. Refer to the exhibit. A network engineer configures a GRE tunnel and enters the show interface tunnel command. What does the output confirm about the configuration?

A.Interface tracking is configured.

B.The tunnel mode is set to the default.

C.The physical interface MTU is 1476 bytes.

D.The keepalive value is modified from the default value.

Question 6 of 10

7. Refer to the exhibit.

Which command must be applied to Router1 to bring the GRE tunnel to an up/up state?

Router1(config-if)#tunnel source Loopback0

Router1(config)#interface tunnel0

Router1(config-if)#tunnel mode gre multipoint

Router1(config-if)#tunnel source GigabitEthernet0/1

Question 7 of 10

8. Refer to the exhibit.

> Frame 24: 138 bytes on wire (1104 bits), 138 bytes captured (1104 bits) on interface 0
> Ethernet II, Src: 50:00:00:01:00:01 (50:00:00:01:00:01), Dst: 50:00:00:02:00:01 (50:00:00:02:00:01)
> Internet Protocol Version 4, Src: 209.165.202.130, Dst: 209.165.202.134
> Generic Routing Encapsulation (IP)
> Internet Protocol Version 4, Src: 10.111.111.1, Dst: 10.111.111.2
> Internet Control Message Protocol

A GRE tunnel has been created between HQ and BR routers. What is the tunnel IP on the HQ router?

A.209.165.202.134

B.10.111.111.1

C.209.165.202.130

D.10.111.111.2

Question 8 of 10

9. Refer to the exhibit.

Which configuration must be applied to the HQ router to set up a GRE tunnel between the HQ and BR routers?

interface Tunnel1
ip address 10.111.111.1 255.255.255.0
tunnel source GigabitEthernet0/0
tunnel destination 209.165.202.129

interface Tunnel1
ip address 10.111.111.1 255.255.255.0
tunnel source GigabitEthernet0/0
tunnel destination 209.165.202.134

interface Tunnel1
ip address 209.165.202.130 255.255.255.252
tunnel source GigabitEthernet0/0
tunnel destination 209.165.202.129

interface Tunnel1
ip address 10.111.111.1 255.255.255.0
tunnel source GigabitEthernet0/0
tunnel destination 209.165.202.133

Question 9 of 10

10. Which IPv6 migration method relies on dynamic tunnels that use the 2002::/16 reserved address space?

A.ISATAP

B.6to4

C.GRE

D.6RD

Question 10 of 10