单选题
An IS-IS router is adjacent to and passing traffic with a neighbor. You perform a show is interface detail command and notice that for some interfaces you have a circuit type of 3. Which IS-IS level（s） is enabled on these interfaces？（）
Level 1 only
Level 2 only
Level 1 and Level 2
Level 3 only
单选题
Which extension to the OSPFv2 protocol supports traffic engineering？（）
LSA Type 8
LSA Type 9
LSA Type 10
Transparent LSA
单选题
Which method of dynamic RP election is non-proprietary？（）
Auto-RP
Static RP
Bootstrap Protocol
Pim Sparse-Dense mode
单选题
In JUNOS software， what is required to redistribute RIP routes into OSPF？（）
Apply an export policy in RIP
Apply an import policy in RIP
Apply an export policy in OSPF
Apply an import policy in OSPF
多选题
Which pre-conditions must be met before an OSPF router can perform graceful restart？（）
Router must be ABR
Router must contain one sham link.
The network topology must be stable.
Router must be able to forward packets.
Neighbors must support graceful restart.
多选题
Which three attributes are advertised to the remote PE and BGP-based VPNs？（）
Circuit ID
VPN label
Route target
VPN number
Route distinguisher
多选题
What are two functions associated with JUNOS software class of service？（）
Log incoming traffic.
Manage ingress bandwidth.
Mark packets for special handling.
Manage congestion by intelligently dropping traffic.
Classify Frame Relay QoS packets into an equivalent OP CoS environment.
多选题
In which two ways can you influence how downstream LSRs treat MPLS traffic？（）
Use an EXP rewrite table.
Use a DSCP rewrite table.
Statically assign a CoS value to an LDP-signaled LSP
Statically assign a CoS value to an RSVP-signlated LSP
单选题
Which mechanism does External BGP use to prevent the formation of routing loops？（）
AS path
Split horizon
Poison reverse
Unicast RPF check
多选题
You want to limit the number of Type 7 LSAs to be converted into Type 5 LSAs at an appropriate ARB. Which two commands should you use from the [edit] hierarchy level within the JUNOS software configuration mode？（）
set protocols ospf area-range network/mask-length
set protocols ospf area area-id nssa area-range network/mask-length
set protocols ospf area area-id area-range network/mask-length restrict
set protocols ospf area area-id nssa area-range network/mask-length restrict
