Home » SWITCH 642-813 Q&As » Section 4 - Prepare Infrastructure » 642-813 Q&A – Prepare infrastructure to support advanced services (6-10)

642-813 Q&A – Prepare infrastructure to support advanced services (6-10)

Section4 – Prepare infrastructure to support advanced services

QUESTION NO: 6
The network is displayed in the following topology exhibit:

6

Workstation 1 traffic is set for cos 5 and the switch CompanyA sends workstation 1 traffic to the switch CompanyB. However, not all of the traffic from Switch CompanyA is from workstation 1. Switch CompanyA configurations Switch CompanyB Configuration:

mls qos
interface fa0/1
switchport trunk mode
switchport trunk encapsulation dot 1q
switchport trunk native vlan 1

Frames from Workstation 1 are given the rightful priority through Switch CompanyA, but Switch CompanyB doesn’t reciprocate, and treats Workstation 1 frames as if they have no precedence. Which of the following actions will prioritize traffic from Workstation 1?
A. Configure qos all command under Switch CompanyB fa0/1 interface.
B. Configure mls qos trust cos command under Switch CompanyB fa0/1 interface.
C. Configure mls qos trust cos 5 command under Switch CompanyB fa0/1 interface.
D. Configure qos cos 5 command under Switch CompanyB fa0/1 interface.
E. Configure mls qos trust cos command under Switch CompanyA fa0/1 interface.
F. Configure qos cos 5 command under Switch CompanyA fa0/1 interface.
Answer: B

QUESTION NO: 7
Refer to the exhibit. Why does the trust state of interface FastEthernet 0/3 show “not trusted”?

7
A. DSCP map needs to be configured for VOIP.
B. ToS has been misconfigured.
C. The command mls qos needs to be turned on in global configuration mode.
D. ToS has not been configured.
E. There is not a Cisco Phone attached to the interface.
Answer: E
Explanation:
CDP is a device discovery protocol that runs over Layer 2 (the data link layer) on all Ciscomanufactured devices (routers, bridges, access servers, and switches) and allows network management applications to discover Cisco devices that are neighbors of already known devices.
With CDP, network management applications can learn the device type and the Simple Network Management Protocol (SNMP) agent address of neighboring devices running lower-layer, transparent protocols. This feature enables applications to send SNMP queries to neighboring devices.
CDP runs on all media that support Sub network Access Protocol (SNAP). Because CDP runs over the data-link layer only, two systems that support different network-layer protocols can learn about each other.
Communication between Switch and IP Phone is performed by CDP protocol. There is no CDP neighbor and trusted state also no trusted.

QUESTION NO: 8
What is the effect of enabling a voice VLAN on a Catalyst switch port?
A.PortFast is disabled on the port.
B.Untagged traffic is sent according to the default CoS priority of the port.
C.Port security is automatically enabled on a voice VLAN port.
D.The CoS is trusted for 802.1P or 802.1Q tagged traffic.
Answer: B
Explanation:
Default Voice VLAN Configuration:
The voice VLAN feature is disabled by default.
When the voice VLAN feature is enabled, all untagged traffic is sent according to the default CoS priority of the port. The CoS value is not trusted for 802.1P or 802.1Q tagged traffic.

QUESTION NO: 9
Which three characteristics are true about voice traffic in the campus network? (Choose three.)
A. TCP retransmits
B. benign
C. greedy
D. drop sensitive
E. smooth
F. delay insensitive
Answer: BDE

QUESTION NO: 10
Access Point R1 is an Aironet 1200 that has been converted from autonomous mode to LWAPP mode. After this conversion, which two statements are true? (Select two)
A. LWAPP-enabled access points can still communicate with Wireless Domain Services (WDS) devices.
B. An LWAPP-enabled access point console port provides read-only access to the unit.
C. LWAPP-enabled access points support Layer 2 LWAPP.
D. LWAPP-enabled access points must get an IP address and discover the controller using DHCP, DNS, or an IP subnet broadcast.
E. An LWAPP-enabled access point console port provides read-write access to the unit.
Answer: BD
Explanation:
Some of the restrictions that are imposed on a Cisco IOS Software-based AP after conversion to lightweight mode include the following: APs that are converted to Lightweight AP Protocol (LWAPP) do not support Wireless Domain Services (WDS). LWAPP-converted APs communicate only with Cisco Wireless LAN (WLAN) Controllers (WLCs) and cannot communicate with WDS devices. However, the WLC provides functionality that is equivalent to the WDS when the AP associates to the WLC. APs that are converted to LWAPP mode support eight basic service set identifiers (BSSIDs) per radio and a total of eight WLANs per AP. APs that are converted to LWAPP must get an IP address and discover the WLC with use of DHCP, a Domain Name System (DNS), or an IP subnet broadcast. APs that are converted to LWAPP do not support Layer 2 LWAPP. APs that are converted to LWAPP provide a read-only console port.

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