Cisco ENCOR IP Services and QoS 3

Question 1

Which field in the IPv4 header is used by DiffServ to carry DSCP markings?

Accepted Answer

ToS (Type of Service) / DSCP field

Answer

TTL

Answer

Protocol

Answer

Flags

Question 2

What is the primary purpose of HSRP (Hot Standby Router Protocol)?

Accepted Answer

Provide a virtual default gateway with automatic failover for LAN hosts

Answer

Load balance traffic across multiple WAN links

Answer

Synchronize routing tables

Answer

Aggregate multiple interfaces

Question 3

In NAT, what does PAT (Port Address Translation) allow?

Accepted Answer

Many internal hosts to share a single public IP by using unique source port numbers

Answer

One-to-one IP mapping

Answer

Static mapping of well-known ports

Answer

Bidirectional NAT translation

Question 4

What is the SNMP OID structure based on?

Accepted Answer

A hierarchical tree defined by the Management Information Base (MIB)

Answer

Hexadecimal MAC addresses

Answer

IP address subnetting

Answer

Base-64 encoding

Question 5

Which first-hop redundancy protocol is an open standard (not Cisco proprietary)?

Accepted Answer

VRRP

Answer

HSRP

Answer

GLBP

Answer

IRDP

Question 6

What does the 'ip helper-address' command do on a Cisco router interface?

Accepted Answer

Forwards broadcast UDP packets (including DHCP) to a specified unicast address

Answer

Assigns a secondary IP address

Answer

Enables proxy ARP

Answer

Configures a static route