Cisco 300-320 Online Practice Questions and Exam Preparation

Cisco 300-320 Online Questions & Answers

• Question 551:

  Which of these Layer 2 access designs does not support VLAN extensions?

  A. FlexLinks
  B. loop-free U
  C. looped square
  D. looped triangle
  E. loop-free inverted U
  B. loop-free U

• Question 552:

  Engineer is designing QoS for application. Which QoS architecture should he choose if application needs to have reserved bandwidth prior to sending data?

  A. Differentiated services
  B. Integrated services
  C. LLQ
  D. ToS
  B. Integrated services

• Question 553:

  An engineer is designing an infrastructure to use a 40 Gigabit link as the primary uplink and a 10 Gigabit uplink as the alternate path. Which routing protocol allows for unequal cost load balancing?

  A. BGP
  B. EIGRP
  C. IS-IS
  D. OSPF
  B. EIGRP

• Question 554:

  From a design perspective which two of the following OSPF statements are most relevant? (Choose two)

  A. OSPF stub areas can be thought of as a simple form of summarization
  B. OSPF cannot filter intra-area routes
  C. An ABR can only exist in two areas - the backbone and one adjacent area
  D. Performance issues in the Backbone area can be offset by allowing some traffic to transit a non-backbone area
  E. The size of an area (the LSDB) will be constrained by the size of the IP MTU
  A. OSPF stub areas can be thought of as a simple form of summarization
  B. OSPF cannot filter intra-area routes

• Question 555:

  Which of this is true of IP addressing with regard to VPN termination?

  A. IGP routing protocols will update their routing tables over an IPsec VPN
  B. Termination devices need routable addresses inside the VPN
  C. Addressing design need to allow for summarization
  D. Designs should not include overlapping address spaces between sites, since NAT is not supported
  C. Addressing design need to allow for summarization

  ---

  Best design practices say the VPN design should allow for summarization. With regards to D - sometimes you cannot avoid overlapping addresses as this is what is configured at client's end, and the only option is to hide the overlapping subnet behind NAT - based on experience (The author of this remark has 50x VPN tunnels and majority of them is using NAT, even if the subnet doesn't overlap, we want to hide our real IPs behind something else - extra security)

• Question 556:

  Which two features can you implement to control which networks are advertised by a BGP router? (Choose two.)

  A. prefix lists
  B. route maps
  C. policy maps
  D. router SNMP statements
  E. crypto maps
  A. prefix lists
  B. route maps

• Question 557:

  A dual-homed office is opposed to using path optimization by flows. Which feature helps with application resiliency?

  A. MLPPP
  B. ATM
  C. PfR
  D. CEF
  C. PfR

• Question 558:

  At a certain customer's site, a NAS is both physically and logically in the traffic path. The NAS identifies clients solely based on their MAC addresses. In which access mode has this NAS been configured to operate?

  A. Layer 2 mode
  B. Layer 3 Edge mode
  C. Layer 3 Central mode
  D. Layer 3 In-Band mode
  A. Layer 2 mode

• Question 559:

  A network engineer wants to limit the EIGRP query scope to avoid high CPU and memory utilization on low-end routers as well as limiting the possibility of a stuck- in-active routing event between HQ and branch offices.

  Which way to achieve these goals?

  A. Configure different Autonomous System number per each branch office and HQ and redistribute routes between autonomous systems.
  B. Configure all routers at branch offices as EIGRP stub and allow only directly connected networks at branch offices to be advertised to HQ
  C. Configure all routers at branch offices as EIGRP stub
  D. Configure all routers at HQ and branch offices as EIGRP stub
  C. Configure all routers at branch offices as EIGRP stub

• Question 560:

  What is the correct oversubscription ratio between aggregation and core layer? (E)

  A. 1 to 2
  B. 1 to 4
  C. 1 to 8
  D. 1 to 10
  B. 1 to 4

  ---

  Network oversubscription refers to a point of bandwidth consolidation where the ingress bandwidth is greater than the egress bandwidth. For example, at an ISL uplink from an edge layer switch to a core, the oversubscription of the ISL is typically on the order of 7:1 or greater. In a single director fabric, the fan-out ratio of server to storage subsystem ports is directly related to the network oversubscription and is typically on the order of 10:1 or higher. Network oversubscription is normal and unavoidable-it is a direct by product of the primary purpose for deploying a SAN. An important characteristic of the network related to oversubscription is its ability to fairly allocate its bandwidth resources among all clients of the SAN.