Which three are advantages to creating multiple areas in OSPF? (Choose three.) Select 3 response(s)？（）

A . Out-of-profile packets are queued. B . It causes TCP retransmits. C . Marking and remarking are not supported. D . It does not respond to BECN and foresight messages. E . It uses a single- and two-bucket mechanism for metering.

A . Multicast addresses 224.0.0.0 through 224.0.0.255 are always forwarded because they are transmitted  with Time to Live （TTL） greater than 1. B . Multicast addresses 224.0.0.5 and 224.0.0.6 are source multicast addresses for OSPF routers. C . Multicast addresses 224.0.0.13 and 224.0.0.22 are reserved link-local addresses used by PIMv2 and  IGMPv3. D . Because they would map to overlapping IP multicast MAC addresses， multicast addresses 224.0.1.1  and 238.1.1.1 could not be used together. E . Multicast address 224.0.1.1 has been reserved for the Network Time Protocol （NTP） by the IANA F . The administratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in  purpose to RFC 1918 private unicast addresses.

A .  provides advanced security such as hardware encryption acceleration B .  provides investment protection through increased modularity C .  comes equipped with at least one 1000-based TX interlace D .  contains integrated wireless access using the 802.11 g/b standard E .  contains integrated web-based management tools for easy configuration and maintenance

A . shared networking and SAN switching B . reduced cabling C . decreased compute density D . rapid provisioning of additional resource

A . Allows the transportation of all forms of traffic B . Multiplexing is easy C . Clocks do not need to be synchronized D . Reduces network complexity and cost E . Padding is not necessary and not permitted

A . A final method in class X can be abstract if and only if X is abstract. B . A protected method in class X can be overridden by any subclass of X. C . A private static method can be called only within other static methods in class X. D . A non-static public final method in class X can be overridden in any subclass of X. E . A public static method in class X can be called by a subclass of X without explicitly referencing the class X. F . A method with the same signature as a private final method in class X can be implemented in a subclass of X. G . A protected method in class X can be overridden by a subclass of X only if the subclass is in the same package as X.

A . cloud computing B . consumerization C . collaboration D . virtualization E . digital media F . borderless network

A .  high scalability B .  the design supports a layered security model C .  firewall addressing does not need to change D .  IPsec decrypted traffic is inspected by the firewall E .  there is a centralized point for logging and content inspectio

A . A user cannot set privileges on the persistent lightweight jobs B . Persistent lightweight jobs generate a large amount of metadata C . It is possible to create fully self-contained persistent lightweight jobs D . The use of a template is mandatory to create persistent lightweight jobs E . Persistent lightweight jobs are useful when users need to create a large number of jobs in a short time

A . Security increases because only the network administrator may change the routing tables B . Configuration complexity decreases as network size increases C . Routing updates are automatically sent to neighbors D . Route summarization is compued automatically by the router E . Routing traffic load is reduced when used in stub network links F . An efficient algorithm is used to build routing tables,using automatic updates G . Routing tables adapt automatically to topology changes.

A . VLANs establish broadcast domains in switched networks. B . VLANs utilize packet filtering to enhance network security. C . VLANs provide a method of conserving IP addresses in large networks. D . VLANs provide a low-latency internet working alternative to routed networks. E . VLANs allow access to network services based on department, not physical location. F . VLANs can greatly simplify adding, moving, or changing hosts on the network.

A .  The default constructor initializes method variables. B .  The default constructor has the same access as its class. C .  The default constructor invoked the no-arg constructor of the superclass. D .  If a class lacks a no-arg constructor， the compiler always creates a default constructor.  E .  The compiler creates a default constructor only when there are no other constructors for the class.

A . It has the same maximum hop count as version 1. B . It uses broadcasts for its routing updates. C . It is a classless routing protocol. D . It has a lower default administrative distance than RIP version 1. E . It supports authentication. F . It does not send the subnet mask in updates.

A . A MERGE statement is used to merge the data of one table with data from another. B . A MERGE statement replaces the data of one table with that of another. C . A MERGE statement can be used to insert new rows into a table. D . A MERGE statement can be used to update existing rows in a table.

A . Send B . Raise C . Delete D . Receive E . Acknowledge

A . NAP and NSP provide secure access to corporate gateways without managing end-to-end PVCs.NAP and NSP use Layer 3 routing，Layer 2 Forwarding，or Layer 2 Tunneling Protocol tunnels.Hence，they can scale their business models for selling wholesale service B . The NSP can oversubscribe by deploying idle and session timeouts using an industry standard RADIUS server for each subscriber C . Only a single session per CPE on one virtual channel （VC).The username and password are configured on the CPE， so all users behind the CPE for that particular VC can access only one set ofservices. Users cannot select different sets of services， although using multiple VCs and establishing different PPP session on different VCs is possible D . If a single IP address is provided to the CPE， and NAT or PAT is implemented，certain applications such as IPTV，which embed IP information in the payload， well not work. Additionally，if an IP subnet feature is used，an IP address also has to be reserved for the CPE E . PPPoA can use the features on the Cisco Service Selection Gateway （SSG）

A .  A lightweight AP receives control and configuration from a WLAN controller to which it is associated. B .  A WLAN client that is operating in half-duplex mode will delay all clients in that WLAN C .  A dhoc mode allows mobile clients to connect directly without an intermediate AP D .  Another term for infrastructure mode is independent service set （IBSS） E .  The Aironet 1230 access point is an example of an access point that operates solely as a lightweight  access point. F .  WLANs are designed to share the medium and can easily handle an increased demand of channel  contention.

A . shared networking and SAN switching B . reduced cabling C . decreased compute density D . rapid provisioning of additional resource

A . high scalability B . the design supports a layered security model C . firewall addressing does not need to change D . IPsec decrypted traffic is inspected by the firewall E . there is a centralized point for logging and content inspectio

A . Cisco Express Forwarding （CEF） must be enabled as a prerequisite to running MPLS on a Cisco router. B . Frame-mode MPLS inserts a 32-bit label between the Layer 3 and Layer 4 headers. C . MPLS is designed for use with frame-based Layer 2 encapsulation protocols such as Frame Relay， but is not supported by ATM because of ATM fixed-length cells. D . OSPF， EIGRP， IS-IS， RIP， and BGP can be used in the control plane. E . The control plane is responsible for forwarding packets. F . The two major components of MPLS include the control plane and the data plane.

A . VLANs establish broadcast domains in switched networks. B . VLANs utilize packet filtering to enhance network security. C . VLANs provide a method of conserving IP addresses in large networks. D . VLANs provide a low-latency internetworking alternative to routed networks. E . VLANs allow access to network services based on department,not physical location. F . VLANs can greatly simplify adding,moving,or changing hosts on the network.

A . Security increases because only the network administrator may change the routing tables. B . Configuration complexity decreases as network size increases. C . Routing updates are automatically sent to neighbors. D . Route summarization iscompued automatically by the router. E . Routing traffic load is reduced when used in stub network links F . An efficient algorithm is used to build routing tables，using automatic updates. G . Routing tables adapt automatically to topology changes.