Question 1

Which of the following statements about IP routes are correct?

Options :

A : In a LAN, a route consists of the following parts: IP address and MAC address.

B : IP routes are used to guide IP packet forwarding.

C : Routing is a concept at the second layer of the OSI model.

D : Any route must contain the following information: source address, destination address, and next hop.

Answer: B

Question 2

In the GPON system, the GEM frame is the smallest bearer unit. Which of the following cell formats can be carried by the GEM frame? (Select All that Apply)

Options :

A : T1

B : E1

C : POTS

D : Ethernet

Answer: A,B,D

Question 3

The routing table of a router contains the following two entries: Destination/Mask Protocol Pre Cost Nexthop Interface 9.0.0.0/8 OSPF 10 50 1.1.1.1 Serial0 9.1.0.0/16 RIP 100 5 2.2.2.2 Ethernet0 If the router needs to forward packets with the destination address of 9.1.4.5, which of the following statements is correct?

Options :

A : The router selects the first route, because the priority of OSPF is higher.

B :

The router selects the second route, because this route matches the destination address 9.1.4.5 more accurately.

C : The router selects the second route, because the metric of RIP is smaller.

D :

The router selects the second route, because the outbound interface is Ethernet0, which is faster than Serial0.

Answer: B

Question 4

In a GPON network, which of the following may cause the ONT to fail to be discovered? (Select All that Apply)

Options :

A : The optical power received by the ONT is less than the sensitivity threshold.

B : The ONT auto-find function of the GPON port is disabled.

C : The upstream port of the OLT is down.

D : The optical power received by the ONT is greater than the overload optical power.

Answer: A,B,D

Question 5

The OLT supports the ( ) VLAN attributes. (Select All that Apply)

Options :

A : MUX

B : Stacking

C : Common

D : QinQ

Answer: B,C,D