Review Questions 197

Review Questions

1.How many bits long is a route distinguisher?

A.16

B.32

C.48

D.64

2.VPN names ___________ case-sensitive.

A.Are

B.Are not

3.Which of the following protocols is used to propagate VPN labels between edge routers?

A.TDP

B.LDP

C.Standard BGP with extended communities

D.MP-BGP

4.In Multi-Protocol BGP (MP-BGP), neighbors need to be ___________.

A.Configured

B.Activated

C.Sent standard communities

D.Configured with VDP

5.Which of the following commands is used to configure a VRF?

A.rd #.#

B.ip vrf vpn_name

C.address-family vpnv4

D.send-community both

198Chapter 5 MPLS VPNs

6.Which of the following commands is used to configure a route distinguisher?

A.rd #.#

B.ip vrf vpn_name

C.address-family vpnv4

D.send-community both

7.Which of the following commands configures MP-BGP to send extended communities? (Choose all that apply.)

A.send-community standard

B.send community extended

C.send-community both

D.send-community extended

8.Which of the following commands is used to enter MP-BGP configuration from BGP?

A.rd #.#

B.ip vrf vpn_name

C.address-family vpnv4

D.send-community both

9.How long in bits is the VPNv4 address?

A.32

B.48

C.64

D.96

10.Which of the following is the preferred route distinguisher identification scheme?

Review Questions 199

A.16:32

B.16:16:32

C.32:16

D.32:64

11.To have a single route appear as many routers, which of the following mechanisms is used?

A.RD

B.VPNv4

C.VPN

D.VRF

12.Which of the following mechanisms keeps overlapping addresses from doing so in MP-BGP?

A.RD

B.VPNv4

C.VPN

D.VRF

13.Which of the following is not a component of a VRF?

A.VRF-specific routes

B.CEF

C.Global routing table

D.None of the above

14.MPLS VPNs offer ___________ security as traditional overlay VPNs.

A.The same

B.Worse

C.Better

D.None of the above

200Chapter 5 MPLS VPNs

15.P routers ___________ knowledge of a customer’s VPN routes.

A.Do have

B.Do not have

16.A(n) ___________ imposes the VPN label.

A.LSR

B.LSP

C.Edge-LSR

D.None of the above

17.By default, BGP sends ___________.

A.Standard communities

B.Extended communities

C.No communities

18.What types of routes are in the PE router’s global routing table?

A.Customer routes

B.Service provider routes

C.Customer and service provider routes

D.None of the above

19.What types of routes are in the PE router’s VRF for a particular customer?

A.Customer routes

B.Service provider routes

C.Customer and service provider routes

D.None of the above

20.MP-BGP within an AS is called ___________.

A.MP-BGP

B.MP-IBGP

C.MP-EBGP

D.MP-MBGP