单项选择题

Refer to the exhibit. MPLS has been configured on all routers in the domain. In order for R2 and R3 to forward frames between them with label headers, what additional configuration will be required on devices that are attached to the LAN segment?()

A.Decrease the maximum MTU requirements on all router interfaces that are attached to the LAN segment.
B.Increase the maximum MTU requirements on all router interfaces that are attached to the LAN segment.
C.No additional configuration is required. Interface MTU size will be automatically adjusted to accommodate the larger size frames.
D.No additional configuration is required. Frames with larger MTU size will be automatically fragmented and forwarded on all LAN segments.


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1.单项选择题

Refer to the exhibit. The show mpls interfaces detail command has been used to display information about the interfaces on router R1 that have been configured for label switching. Which statement is true about the MPLS edge router R1?()

A.Packets can be labeled and forwarded out interface Fa0/1 because of the MPLS operational status of the interface.
B.Because LSP tunnel labeling has not been enabled on interface Fa0/1, packets cannot be labeled and forwarded out interface Fa0/1.
C.Packets can be labeled and forwarded out interface Fa1/1 because MPLS has been enabled on this interface.
D.Because the MTU size is increased above the size limit, packets cannot be labeled and forwarded out interface Fa1/1.

2.单项选择题What is a reason for implementing MPLS in a network?()

A.MPLS eliminates the need of an IGP in the core.
B.MPLS reduces the required number of BGP-enabled devices in the core.
C.Reduces routing table lookup since only the MPLS core routers perform routing table lookups.
D.MPLS eliminates the need for fully meshed connections between BGP enabled devices.

3.多项选择题What are two possible actions an IOS IPS can take if a packet in a session matches a signature?()

A.reset the connection
B.forward the packet
C.check the packet against an ACL
D.drop the packet

4.单项选择题Which statement describes Reverse Route Injection (RRI)?()

A.A static route that points towards the Cisco Easy VPN server is created on the remote client.
B.A static route is created on the Cisco Easy VPN server for the internal IP address of each VPN client.
C.A default route is injected into the route table of the remote client.
D.A default route is injected into the route table of the Cisco Easy VPN server.

5.多项选择题Which three techniques should be used to secure management protocols?()

A.Configure SNMP with only read-only community strings.
B.Encrypt TFTP and syslog traffic in an IPSec tunnel.
C.Implement RFC 3704 filtering at the perimeter router when allowing syslog access from devices on the outside of a firewall.
D.Synchronize the NTP master clock with an Internet atomic clock.
E.Use SNMP version 2.
F.Use TFTP version 3 or above because these versions support a cryptographic authentication mechanism between peers.

6.多项选择题If an edge Label Switch Router (LSR) is properly configured,which three combinations are possible?()

A.A received IP packet is forwarded based on the IP destination address and the packet is sent as an IP packet.
B.An IP destination exists in the IP forwarding table. A received labeled packet is dropped because the label is not found in the LFIB table.
C.There is an MPLS label-switched path toward the destination. A received IP packet is dropped because the destination is not found in the IP forwarding table.
D.A received IP packet is forwarded based on the IP destination address and the packet is sent as a labeled packet.
E.A received labeled IP packet is forwarded based upon both the label and the IP address.
F.A received labeled packet is forwarded based on the label. After the label is swapped,the newly labeled packet is sent.

7.单项选择题What are the four steps, in their correct order, to mitigate a worm attack?()

A.contain,inoculate,quarantine,and treat
B.inoculate,contain,quarantine,and treat
C.quarantine,contain,inoculate,and treat
D.preparation,identification,traceback,and postmortem
E.preparation,classification,reaction,and treat
F.identification,inoculation,postmortem,and reaction

8.多项选择题Which two network attack statements are true?()

A.Access attacks can consist of password attacks,trust exploitation,port redirection,and man-in-the-middle attacks.
B.Access attacks can consist of UDP and TCP SYN flooding,ICMP echo-request floods,and ICMP directed broadcasts.
C.DoS attacks can be reduced through the use of access control configuration,encryption,and RFC 2827 filtering.
D.DoS attacks can consist of IP spoofing and DDoS attacks.
E.IP spoofing can be reduced through the use of policy-based routing.
F.IP spoofing exploits known vulnerabilities in authentication services, FTP services,and web services to gain entry to web accounts,confidential databases,and other sensitive information.

9.单项选择题

Refer to the exhibit. What statement is true about the interface S1/0 on router R1?()

A.Labeled packets can be sent over an interface.
B.MPLS Layer 2 negotiations have occurred.
C.IP label switching has been disabled on this interface.
D.None of the MPLS protocols have been configured on the interface.

10.多项选择题Which two statements describe the functions and operations of IDS and IPS systems?()

A.A network administrator entering a wrong password would generate a true-negative alarm.
B.A false positive alarm is generated when an IDS/IPS signature is correctly identified.
C.An IDS is significantly more advanced over IPS because of its ability to prevent network attacks.
D.Cisco IDS works inline and stops attacks before they enter the network.
E.Cisco IPS taps the network traffic and responds after an attack.
F.Profile-based intrusion detection is also known as "anomaly detection".