ICND1 WAN Technologies & Network Security 4

Question 1

What is the default encapsulation type on a Cisco serial interface connected to another Cisco router?

Accepted Answer

HDLC

Answer

Cisco uses its own variation of HDLC (High-Level Data Link Control) as the default serial encapsulation.

Question 2

An administrator applies an ACL outbound on an interface. Which traffic does this ACL evaluate?

Accepted Answer

Traffic leaving the router through that interface

Answer

An outbound ACL evaluates packets after the routing decision is made, as they exit the specified interface.

Question 3

Which WAN technology uses 23 B-channels and 1 D-channel in its PRI (Primary Rate Interface) configuration in North America?

Accepted Answer

ISDN

Answer

ISDN PRI in North America provides 23 bearer (B) channels at 64 Kbps each plus one 64 Kbps delta (D) channel for signaling.

Question 4

When configuring a site-to-site IPsec VPN, what is the purpose of IKE Phase 1?

Accepted Answer

To establish a secure management channel (ISAKMP SA) for IKE Phase 2 negotiation

Answer

IKE Phase 1 creates the ISAKMP Security Association, a secure authenticated channel used to negotiate the IPsec SA in Phase 2.

Question 5

Which command correctly configures a named extended ACL on a Cisco router?

Accepted Answer

ip access-list extended WEBTRAFFIC

Answer

'ip access-list extended NAME' creates a named extended ACL in ACL configuration mode.

(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test