By default, when does a Cisco router switch over from the root-path-tree to the source-specific SPT?
Highlight for answer: When the first packet is received from the shared tree. You can change this with the ‘ip pim spt-threshold’ command.
A port in the Spanning Tree state of ‘blocking’ does not allow any type of traffic – true or false?
Highlight for answer: False – BPDUs are still allowed over the link.
What is the effect of issuing the exec level command ‘terminal monitor’?
Highlight for answer: This command will enable the device to send log messages to telnet sessions.
What are unsolicited messages sent from an SNMP agent to an SNMP management station called?
Highlight for answer: SNMP traps. SNMP informs fit this description as well.
What is the name of a well-known discretionary BGP attribute that is used to alert downstream routers that a loss of path information has occurred?
Highlight for answer: ATOMIC_AGGREGATE.
What is the practice of advertising a contiguous set of addresses with a single, less-specific address called?
Highlight for answer: Summarization or route aggregation
Which two commands can be used to disable the executive timeout feature?
Highlight for answer: no exec-timeout or exec-timeout 0 0
An OSPF virtual-link is a link to the backbone area through….
Highlight for answer: a nonbackbone(transit), non-stub area.
When configuring OSPF Fast Hello Packets, does the hello multiplier need to match on the entire segment?
Highlight for answer: Not as long as at least one hello packet is sent within the dead-interval (1 second).
R3#sh frame map
Serial0/0 (up): ip 155.3.0.3 dlci 503(0x1F7,0x7C70), static,
broadcast,
CISCO, status defined, active
TCP/IP Header Compression (inherited), connections: 218959117
RTP Header Compression (inherited), connections: 218959117
R5#sh frame map
Serial1/0 (up): ip 155.1.0.5 dlci 305(0x131,0x4C10), static,
broadcast,
CISCO, status defined, active
TCP/IP Header Compression (enabled), connections: 256
RTP Header Compression (enabled), connections: 256
Given the above output, what is the fundamental difference between the TCP and RTP header compression configurations on R3 and R5?
Highlight for answer: On R3, TCP and RTP header compression have been enabled on the interface level as indicated by the ‘inherited’ description in the ‘show frame-relay map’ output. On R5 it has been enabled via the frame-relay map map statement(with the keyword ‘compress’).
