Routing&SwitchingY3

Which UDP port does NTP use by default?

123

What is the primary purpose of Syslog?

Log and monitor device messages

Which parameters are compulsory to configure OSPF v2 on an active router interface? Choose any two.

OSPF area, OSPF process id

Which two pieces of information are included in a typical Syslog message?

Timestamp, Severity level

Filters source and destination IP, protocol, or port
Can be numbered 1-99

Can be numbered 100-199

Filters only source IP

Extended ACL

Extended ACL

Extended ACL

Standard ACL

A UB student is studying for the Cisco CCNA certification and visualizes extended access lists. Which three keywords could immediately follow the keywords permit or deny as part of an extended access list? (Choose three.)

tcp, udp, icmp

Which statements about OSPF areas are correct?

All areas must connect to backbone area 0,

Areas help reduce routing table size

Select two valid DHCP message types.

DISCOVER, REQUEST

Which two statement describes a difference between the operation of inbound and outbound ACLs? (Choose two.)

Inbound ACLs are processed before the packets are routed.,

Outbound ACLs are processed after the routing is completed.

Using the OSPF lab diagram with loopbacks, which two configuration practices are appropriate for predictable Router IDs and stable OSPF behavior?

Configure a loopback interface and let OSPF pick it as the Router ID.,

Manually set router-id x.x.x.x under the OSPF process to ensure stability.

Standard ACLs filter traffic based on which criteria?

Source IP address

Select two SNMP security features.

Community strings,

User-based authentication (v3)

What is the primary function of DHCP?

Automatically assign IP addresses to clients

Why would a loopback address be configured on a router?

Single IP address for management, it's always up, and it's a consistent router ID

Which two commands are used to test DNS resolution?

nslookup, ping hostname

If the provided ACEs are in the same ACL, which ACE should be listed first in the ACL according to best practice?

permit udp 172.16.0.0 0.0.255.255 host 172.16.1.5 eq snmptrap

Which statement describes DHCP static binding?

Server assigns a fixed IP to a specific MAC address

What happens when a DHCP lease expires?

Client must renew or request a new IP address

Select two valid NTP time sources.

GPS Clock, Atomic Clock

Look at the single‑area OSPF Packet Tracer diagram (three routers in one area). Which two verification commands on a Cisco router would best show OSPF neighbor relationships and OSPF route entries respectively?

show ip ospf neighbor, show ip route ospf

Which metric does OSPF use to calculate the best path?

Cost

Which of the following are valid OSPF LSAs?

Router LSA, Network LSA

Polling Interval

Leap Indicator
Stratum 1

Stratum 2

Frequency at which NTP

Indicates a pending leap

Directly connected to an authorative

Receives time from Stratum 1 servers

Which command displays Syslog messages stored locally?

show logging

Which is true about the OSPF router-id? (Choose two)

It is used for type 1 router LSA,

Highest IP address of the loopback is used

Which two tools can be used to manage SNMP devices?

PRTG Network Monitor,

SolarWinds NPM

Syslog Server
Severity

Facility

Timestamp

Collects and stores messages

Indicates importance of message

Category of message source

Indicates when the even occured

In applying an ACL to a router interface, which traffic is designated as outbound?

traffic that is leaving the router and going toward the destination host

What is the purpose of a DHCP relay agent?

Forward DHCP messages between clients and remote servers

Which of the following are valid standard ACL statements?

permit 192.168.10.0 0.0.0.255,

deny 10.0.0.0 0.0.0.255

Which command sets the DNS server on a Cisco router?

ip name-server

What is the main purpose of SNMP?

Monitor and manage network devices

10 seconds

30 minutes

40 seconds

5 seconds

Hello interval

LSRefresh Timer

Dead Interval

SPF Timer

Which of the following are two DNS zone types?

Primary,

Secondary

Which command applies ACL 10 inbound on interface FastEthernet0/0?

ip access-group 10 in

What two functions describe the uses of access control lists? (Choose two.)

ACLs can control which areas a host can access on a network.,

ACLs provide a basic level of security for network access.

Using the branched network diagram (branch offices via a central router) teaching extended ACLs, which two tasks can you accomplish with an extended ACL that you cannot do with a standard ACL?

Permit or deny traffic based on TCP/UDP port numbers (e.g., deny telnet).

Filter based on source and destination IP, and protocol (e.g., permit tcp 10.0.0.0 0.0.0.255 172.16.0.0 0.0.0.255 eq 80).

Select two types of DNS resolution.

Iterative

Recursive

Which of the following statements are not true regarding the configuration of OSPF routing protocols? Choose any two.

Single area  OSPF network must use area O.,

The area number and the process id must be the same.

Select two valid Syslog severity levels.

0 Emergency

3 Error