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单项选择题What is a function of the OSPF Type 7 LSA？（）

A.It describes the reachability of routes in stub areas.
B.It describes the reachability of routes in totally-stubby areas.
C.It describes the reachability of routes in not-so-stubby areas.
D.It describes the reachability of routes in partially-stubby areas.

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1.多项选择题Which three authentication options does IS-IS support？（）

A.MD5
B.DES
C.Kerberos
D.Unauthenticated
E.Simple password

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2.多项选择题Which four components make up the Network Entity Title （NET） of an IS-IS router？（）

A.AF
B.AFI
C.MAC
D.Area
E.SysID
F.A-Selector
G.N-Selector
H.IP-address

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3.单项选择题Routers A and B are connected with a point-to-point OC-3 interface. Each router’s OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in different areas.How many IS-IS adjacencies exist between the two routers？（）

A.0
B.1
C.2
D.3

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4.单项选择题In IS-IS， how does the restarting router inform its helpers that a restarts event occurred？（）

A.Sending out a graceful restart PDU
B.Sending an LSP that contains no TLVs.
C.Sending out a restarts TLV with the RR bit set.
D.Reflooding its LSP with a maximum sequence number.

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5.单项选择题You have a Level 1-only router （Router A） in IS-IS area 49.0001. How does Router A learn how to get to IP prefixed in other areas？（）

A.Router A must have a Level 2 adjacency with the Level 1/Level 2 router in area 49.0001.
B.The Level 1/Level 2 router in area 49.0001 sets the "attached" bit in the Level 2 LSP it floods into area 49.0001.
C.The Level 1/Level 2 router in area 49.0001 sets the "attached" bit in the Level 1 link-state PDU （LSP） it floods into area 49.0001.
D.The Level 1/Level 2 router in area 49.0001 advertises these prefixed into area 49.0001 using a Level 2 LSP it floods into the area.

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6.多项选择题Which two are valid IS-IS PDU types？（）

A.broadcast hellos
B.Level 1 LAN hellos
C.Point-to-point hellos
D.Level 2 point-to-point hellos

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7.多项选择题What are three applications for firewall filters in JUNOS software？（）

A.route filtering
B.protect the routing engine
C.securing the router control plane
D.protect against hidden bridge loops
E.protect against denial of service attacks

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8.单项选择题You have a firewall filter containing two terms applied in an inbound direction on a customer interface. You would like this filter to protect your network from a spoofed denial of service attack. What match criterion should be used in the first term of the filter？（）

A.Source TCP port
B.Source IP address
C.Destination TCP port
D.Destination IP address

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9.单项选择题Which JUNOS software feature allows a user to define specific next-hop values for IP packets based on the source IP address of that packet？（）

A.MPLS
B.Load Balancing
C.Class Based Forwarding
D.Filter Based Forwarding

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10.单项选择题Which extension to the OSPFv2 protocol supports traffic engineering？（）

A.LSA Type 8
B.LSA Type 9
C.LSA Type 10
D.Transparent LSA

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